TW201902575A - Electrostatic dust precipitator and movable air cleaning apparatus - Google Patents

Abstract

An electrostatic dust precipitator includes at least one priming electrode, at least one corona electrode, at least one collecting electrode and at least one exclusion electrode. The corona electrode includes at least one columnar part and at least one needle part. The needle part connects to the surface of the columnar part and extends along direction far away the central line of the columnar part from the surface of the columnar part. The priming electrode and the corona electrode form a charging electric field. The collecting electrode and the exclusion electrode form a collecting electric field. The space of the charging electric field and the space of the collecting electric field connect each other to form a flow field. The flow field has opposite an inlet end and outlet end. The inlet end locates a side far away the collecting electric field in the charging electric field and the outlet end locates a side far away the charging electric field in the collecting electric field.

Description

Electrostatic dust collector and mobile air cleaning equipment

The invention relates to an electrostatic precipitator and a mobile air cleaning device, in particular to an electrostatic precipitator with a thorn portion and a mobile air cleaning device.

In recent years, the ever-changing technology has brought convenience to human life, but it has also caused many environmental pollution. Taking air pollution as an example, the cause of air pollution is nothing more than the dust generated by urban development and the exhaust and suspended particulates emitted by vehicles and factories. When these dusts, exhaust gases and aerosols enter the body, they can cause or aggravate allergic diseases such as allergies, asthma, chronic respiratory diseases and heart.

In view of the rise of modern people's health awareness, the installation of air purifiers at home to filter out harmful substances such as dust, exhaust gas and aerosols in the air has become a common and effective way to protect their own health. Early air cleaners were generally screen type. The filter-type air cleaner guides air and particles through a filter through a fan to filter out harmful substances in the air. However, due to the large wind resistance of the filter, low energy efficiency, and high replacement cost of the filter, high-efficiency electrostatic precipitators are gradually emerging.

The electrostatic air purifier can be divided into a first-order and a second-order. The first-order type is that the charging electric field and the dust-collecting electric field are in the same area, and the second-order type is that the charging electric field and the dust collecting electric field are located in different regions. However, whether it is a first-order or a second-order, the concept of an electrostatic air purifier is to first ionize (charge) harmful substances such as dust, exhaust gas, and suspended particles through a charging electric field, and then pass the dust collecting electric field to ionize the particles. Attached to the dust collecting electrode. However, at present, the electrostatic air cleaner generally has a problem that the charging electric field strength is insufficient or the dust collecting electric field is liable to cause a reverse corona phenomenon, and the dust removal quality of the electrostatic air cleaner is lowered. Among them, the reverse corona phenomenon is that when the amount of charged suspended particles adheres to the dust collecting electrode to a certain extent, the charged suspended particles are easily discharged to the discharge electrode having a strong electric field, resulting in a decrease or even failure of the intensity of the dust collecting electric field.

The present invention provides an electrostatic precipitator and a mobile air cleaning device, thereby solving the problems of insufficient strength of the charging electric field and prone to reverse corona phenomenon in the prior art.

A mobile air cleaning device disclosed in one embodiment of the present invention includes a traffic carrier and an electrostatic precipitator mounted to one of the traffic vehicles. The electrostatic precipitator includes at least one excitation electrode, at least one corona electrode, at least one collection electrode, and at least one repelling electrode. The at least one corona electrode includes at least one columnar portion and at least one thorn portion. At least one thorn is coupled to the surface of the at least one cylindrical portion, and at least one thorn extends in a direction away from a centerline of the at least one cylindrical portion. A charging electric field is formed between the at least one excitation electrode and the at least one corona electrode. A dust collecting electric field is formed between the at least one collecting electrode and the at least one repelling electrode. The dust collecting electric field is connected to the space where the charging electric field is located to form a first-class field. The flow field has a relatively inlet end and an outlet end. The inlet end is located on one side of the excitation electrode away from the collection electrode, and the outlet end is located on one side of the collection electrode away from the excitation electrode.

An electrostatic precipitator according to another embodiment of the present invention includes at least one excitation electrode, at least one corona electrode, at least one collection electrode, and at least one repelling electrode. The at least one corona electrode includes at least one columnar portion and at least one thorn portion. At least one thorn is coupled to the surface of the at least one cylindrical portion, and at least one thorn extends in a direction away from a centerline of the at least one cylindrical portion. A charging electric field is formed between the at least one excitation electrode and the at least one corona electrode. A dust collecting electric field is formed between the at least one collecting electrode and the at least one repelling electrode. The dust collecting electric field is connected to the space where the charging electric field is located to form a first-class field. The flow field has a relatively inlet end and an outlet end. The inlet end is located on one side of the excitation electrode away from the collection electrode, and the outlet end is located on one side of the collection electrode away from the excitation electrode.

According to the electrostatic precipitator and the mobile air cleaning device of the above embodiment, since the corona electrode has a thorn portion, the geometric curvature difference between the excitation electrode and the corona electrode can be increased to increase the electric field strength of the charging electric field. As a result, the degree to which the particles are ionized can be increased.

In addition, the structure of the thorn portion is only located in the charging electric field and is not located in the dust collecting electric field, so that the probability of the reverse corona phenomenon occurring in the dust collecting electric field can be reduced. In this way, the electric field strength of the charging electric field can be increased and the probability of occurrence of a reverse corona phenomenon in the dust collecting electric field can be reduced.

The above description of the present invention and the following description of the embodiments are intended to illustrate and explain the principles of the invention, and to provide a further explanation of the scope of the invention.

Please refer to Figure 1 and Figure 2. 1 is a schematic cross-sectional view of an electrostatic precipitator according to an embodiment of the invention. 2 is a schematic cross-sectional view of the corona electrode of FIG. 1.

As shown in FIG. 1 and FIG. 2, the electrostatic precipitator 1 of the present embodiment includes an excitation electrode 10, a corona electrode 20, a collection electrode 30, and a repelling electrode 40.

The excitation electrode 10 is arranged side by side with the corona electrode 20, and after the excitation electrode 10 and the corona electrode 20 are energized, a charging electric field E1 can be formed between the excitation electrode 10 and the corona electrode 20. In the present embodiment, the corona electrode 20 is connected to, for example, a voltage of 6000 volts (V), and the excitation electrode 10 is grounded, for example, but is not limited thereto. In other embodiments, the corona electrode 20 may be connected to a voltage of 5000 volts (V), and the excitation electrode 10 may be connected to a voltage of minus 20 volts (V).

Next, the collecting electrode 30 and the repelling electrode 40 are arranged side by side, and after the collecting electrode 30 and the repelling electrode 40 are energized, a dust collecting electric field E2 can be formed between the collecting electrode 30 and the repelling electrode 40. In this embodiment, the repelling electrode 40 is connected to a voltage of 6000 volts (V), for example, and the collecting electrode 30 is grounded, for example, but not limited thereto. In other embodiments, the electrode 40 can be repelled to 5,000 volts (V). The voltage, collector electrode 30 is connected to a voltage of minus 20 volts (V).

The charging electric field E1 is in communication with the space in which the dust collecting electric field E2 is located to form the first-class field S. The flow field S has a relatively inlet end 50 and an outlet end 60. The intake end 50 is located on one side of the charging electric field E1 away from the dust collecting electric field E2. The air outlet end 60 is located on one side of the dust collecting electric field E2 away from the charging electric field E1. That is to say, the space in which the charging electric field E1 is located is located upstream of the flow field S, and the space in which the dust collecting electric field E2 is located is located downstream of the flow field S.

In the present embodiment, the corona electrode 20 includes a columnar portion 21 and a plurality of thorn portions 22. The extending direction of the center line A of the columnar portion 21 is, for example, perpendicular to the flow of the gas in the flow field S to the F, and the center line A of the columnar portion 21 of the corona electrode 20 is aligned with the side of the excitation electrode 10 near the collecting electrode 30. .

It should be noted that the center line A of the columnar portion 21 of the present embodiment is tangent to one side of the excitation electrode 10 near the collecting electrode 30, but is not limited thereto. In other embodiments, the center line A of the columnar portion 21 of the corona electrode 20 may also be aligned with one side of the excitation electrode 10 away from the collection electrode 30 or at an intermediate portion of the excitation electrode 10.

In addition, in the present embodiment, the extending direction of the center line A of the columnar portion 21 is an example of the flow direction of the airflow in the flow field S, but is not limited thereto. In other embodiments, the columnar portion The extending direction of the center line A of 21 may also be parallel to the flow direction of the airflow in the flow field S or to the acute or obtuse angle of the airflow in the flow field S.

These thorn portions 22 are connected to the columnar portion 21, and the thorn portions 22 extend in a direction away from the center line A of the columnar portion 21. In this embodiment, the extending direction of each of the thorn portions 22 is parallel to the radial direction R of the columnar portion 21, but the invention is not limited thereto. In other embodiments, the extension of each thorn portion 22 The direction is any angle other than the parallel direction of the radial direction R of the columnar portion 21.

The diameter of the thorn portion 22 is smaller than the diameter of the columnar portion 21 such that the curvature of the tip end of the thorn portion 22 is smaller than the curvature of the columnar portion 21. Since the corona electrode 20 of the present embodiment has a structure of the thorn portion 22, the geometric curvature difference between the excitation electrode 10 and the corona electrode 20 is increased, so that a strong electric field can be generated in the vicinity of the thorn portion 22.

Further, there is a small space in the vicinity of the corona electrode 20 called an ionization region, and the electric field intensity in this space is higher than the electric breakdown strength of the air (3.2 x ^{10 6} V/m). There is an area around each needle whose electric field strength is higher than the air electric breakdown strength. Therefore, when the number of needles is larger or the length of the needle is longer, the space representing the summed ionized area will be larger.

When the particles enter the space in which the charging electric field E1 is from the inlet end 50, the particles are ionized by the strong electric field in the vicinity of the thorn portion 22. In the present embodiment, since the electric field formed by the thorn portion 22 of the corona electrode 20 and the excitation electrode 10 is stronger than the electric field formed by the electrode of the spur-free portion, the probability of ionization of the particles is enhanced, thereby increasing the static electricity. The dust collecting effect of the dust collector 1.

In addition, since the center line A of the columnar portion 21 of the corona electrode 20 of the present embodiment is aligned with the excitation electrode 10 near one side of the collecting electrode 30, the space in which the charged electric field E1 flows out after the particles are charged is relatively difficult. Attached to the excitation electrode 10. The fact that the particles are less likely to adhere to the excitation electrode 10 reduces the probability of occurrence of a back corona phenomenon in the charging electric field E1 of the structure of the thorn portion 22. In this way, the charging electric field E1 can be avoided, and the electrostatic precipitator 1 can be prevented from losing the dust collecting effect.

When the ionized particles enter the space where the dust collecting electric field E2 is located, they are guided by the dust collecting electric field E2, and the ionized particles will adhere to the collecting electrode 30 to achieve the dust collecting effect. When the ionized particles are accumulated in the collecting electrode 30 for a certain amount, a reverse corona phenomenon may still occur. However, since the structure of the thorn portion 22 of the embodiment is only located in the charging electric field E1 and is not located in the dust collecting electric field E2, the The dust collecting electric field E2 has a problem of reverse corona phenomenon.

In addition, the electrostatic precipitator 1 of the present embodiment can be matched with an airflow generator, and the airflow generator can be adjacent to the intake end 50 or the outlet end 60. The airflow generator directs external air from the intake end 50 into the flow field S of the electrostatic precipitator 1 and out of the flow field S from the outlet end 60.

3 is a schematic cross-sectional view of an electrostatic precipitator according to another embodiment of the present invention.

This embodiment is similar to the embodiment of FIG. 1. The charging electric field E1 is also composed of the excitation electrode 10 and the corona electrode 20, and the dust collecting electric field E2 is also composed of the collecting electrode 30 and the repelling electrode 40. The difference is that the number of the excitation electrode 10 and the collection electrode 30 is changed to two, and the corona electrode 20 is interposed between the two excitation electrodes 10, and the repelling electrode 40 is interposed between the two collection electrodes 30.

It should be noted that, in the embodiment of FIG. 3, the repelling electrode 40 is interposed between the two collecting electrodes 30, but is not limited thereto. In other embodiments, the number of the repelling electrodes 40 may also be changed to Two, the number of collecting electrodes 30 is single, and the collecting electrode 30 is interposed between the two repelling electrodes 40.

Similarly, in the embodiment of FIG. 3, the corona electrode 20 is interposed between the two excitation electrodes 10, but not limited thereto. In other embodiments, the number of corona electrodes 20 may also be changed to two. The number of excitation electrodes 10 is single, and the excitation electrode 10 is interposed between the two corona electrodes 20.

Please refer to Figure 4. 4 is a side elevational view of a mobile air cleaning device in accordance with an embodiment of the invention. The mobile air cleaning device 5 of the present embodiment includes a traffic carrier 4 and an electrostatic precipitator 1. The traffic vehicle 4 of the present embodiment is an automobile, but is not limited thereto. In other embodiments, the traffic vehicle can also be a bicycle, a locomotive, a bus, a garbage truck, an aerial camera, a helicopter, and an airplane. Or a ship, etc. The electrostatic precipitator 1 is mounted on the traffic carrier 4. When the traffic carrier 4 moves, the external air can naturally be guided into the flow field S of the electrostatic precipitator 1, so that the mobile clean air operation can be completed without starting the air flow generator (such as a fan). On the contrary, when the traffic carrier 4 stops moving, the airflow generator (such as a fan) can be turned on to force the external air to flow into the flow field S of the electrostatic precipitator 1 through the airflow generator (such as a fan) to complete the fixed point type. Clean air operation.

The advantage of the electrostatic precipitator 1 being mounted on the traffic vehicle 4 is that the traffic vehicle 4 used by the above-mentioned office workers frequently travels on the roads of the urban area and the suburbs, so that the air cleaning operation can be performed on the way to and from work. Further, if the number of the electrostatic precipitators 1 loaded by the traffic carrier 4 is large, the air in the area can be uniformly cleaned.

According to the electrostatic precipitator and the mobile air cleaning device of the above embodiment, since the corona electrode has a thorn portion, the geometric curvature difference between the excitation electrode and the corona electrode can be increased to increase the electric field strength of the charging electric field. As a result, the degree to which the particles are ionized can be increased.

Furthermore, since the corona electrode is perpendicular to the flow direction of the flow field and is aligned with the excitation electrode near one side of the collection electrode, the particles can be charged and then leave the space where the charging electric field is located, so that the charged particles are not easily attached to the excitation electrode. It can avoid the reverse corona phenomenon of the charging electric field.

In addition, the structure of the thorn portion is only located in the charging electric field and is not located in the dust collecting electric field, so that the probability of the reverse corona phenomenon occurring in the dust collecting electric field can be reduced. In this way, the electric field strength of the charging electric field can be increased and the probability of occurrence of the back corona phenomenon can be reduced.

In addition, the electrostatic precipitator is mounted on a traffic vehicle, for example, to enable the office worker to perform air cleaning operations on the way to and from work to achieve urban air cleaning.

While the present invention has been described above in terms of the preferred embodiments thereof, it is not intended to limit the invention, and the invention may be modified and modified without departing from the spirit and scope of the invention. The patent protection scope of the invention is subject to the definition of the scope of the patent application attached to the specification.

1, 1'‧‧‧ electrostatic dust collector

5‧‧‧Mobile air cleaning equipment

4‧‧‧Traffic Vehicles

10‧‧‧Excitation electrode

20‧‧‧corona electrode

21‧‧‧ Column

22‧‧‧thorn

30‧‧‧Collection electrode

40‧‧‧Repellent electrode

50‧‧‧ intake end

60‧‧‧Exhaust end

A‧‧‧Center line extension

E1‧‧‧Charging electric field

E2‧‧‧ dust collecting electric field

F‧‧‧Airflow

P‧‧‧ extending direction

R‧‧‧ radial direction

S‧‧‧ flow field

1 is a schematic cross-sectional view of an electrostatic precipitator according to an embodiment of the invention. 2 is a schematic cross-sectional view of the corona electrode of FIG. 1. 3 is a cross-sectional view of an electrostatic precipitator according to an embodiment of the invention. 4 is a side elevational view of a mobile air cleaning device in accordance with an embodiment of the invention.

Claims (10)

A mobile air cleaning device comprising: a traffic carrier; and an electrostatic precipitator mounted to the traffic carrier, comprising: at least one excitation electrode; at least one corona electrode; at least one collection electrode; and at least one rejection An electrode, the at least one corona electrode comprising at least one columnar portion and at least one thorn portion connected to a surface of the at least one columnar portion, and the at least one thorn portion is spaced apart from the at least one thorn portion Extending in a direction of a center line of a columnar portion, a charging electric field is formed between the at least one excitation electrode and the at least one corona electrode, and a dust collecting electric field is formed between the at least one collecting electrode and the at least one repelling electrode, and The dust collecting electric field is connected to the space where the charging electric field is located to form a first-stage field, and the flow field has a relatively opposite air inlet end and an air outlet end, and the air inlet end is located at a side of the excitation electrode away from the collecting electrode, The outlet end is located on a side of the collecting electrode away from the excitation electrode. The mobile air cleaning device of claim 1, wherein the flow direction of the flow field is perpendicular to an extending direction of the at least one columnar portion. The mobile air cleaning device of claim 2, wherein the at least one corona electrode is aligned with the excitation electrode adjacent to one side of the collection electrode. The mobile air cleaning device of claim 1, wherein the diameter of the thorn is smaller than the diameter of the column. The mobile air cleaning device of claim 1, wherein the at least one excitation electrode and the at least one collection electrode are respectively two, and the at least one corona electrode is located between the two excitation electrodes, the at least A repellent electrode is located between the two collection electrodes. An electrostatic precipitator comprising: at least one excitation electrode; at least one corona electrode, the at least one corona electrode comprising at least one column portion and at least one thorn portion, the at least one thorn portion being coupled to the at least one column a surface of the portion, and the at least one thorn portion extends in a direction away from a center line of the at least one columnar portion, and a charging electric field is formed between the at least one excitation electrode and the at least one corona electrode; at least one collection An electrode; and at least one repulsive electrode, a dust collecting electric field is formed between the at least one collecting electrode and the at least one repulsive electrode, and the dust collecting electric field is connected with the space where the charging electric field is located to form a first-class field, and the flow field has The air inlet end is located at a side of the excitation electrode away from the collecting electrode, and the air outlet end is located at a side of the collecting electrode away from the excitation electrode. The electrostatic precipitator of claim 6, wherein the flow direction of the flow field is perpendicular to an extending direction of the at least one columnar portion. The electrostatic precipitator of claim 7, wherein the at least one corona electrode is aligned with the excitation electrode adjacent to one side of the collection electrode. The electrostatic precipitator of claim 6, wherein the diameter of the thorn is smaller than the diameter of the column. The electrostatic precipitator of claim 6, wherein the at least one excitation electrode and the at least one collection electrode are respectively two, and the at least one corona electrode is located between the two excitation electrodes, the at least one A repelling electrode is located between the two collecting electrodes.