A vortex electric field purification device and its design method

Abstract

The present invention relates to a vortex electric field purification device and its design method, belonging to the technical field of air purification. It includes a frame, and inside the frame, a dust collection area and an ionization area are arranged in parallel. Both the dust collection area and the ionization area include a number of plates that are parallel to each other and arranged at intervals. The minimum distance between the high-voltage plates in the dust collection area and the low-voltage plates in the ionization area in the first direction is not less than the distance between the low-voltage plates and the high-voltage plates in the dust collection area in the second direction. The first direction is parallel to the direction from the air inlet side to the air outlet side of the purification device, the second direction is in the same horizontal plane as the first direction, and the second direction is perpendicular to the first direction. The present invention can avoid the phenomenon of arcing or sparking in the ionization area and the dust collection area, has high reliability, is economical and durable, and multiple vortex electric fields are connected in series. If a fault occurs in the dust collection area of a certain vortex electric field, it does not affect the efficiency of the remaining vortex electric fields.

Description

Technical Field

[0001] The present invention belongs to the technical field of air purification, and particularly relates to a vortex electric field purification device and its design method. Background Art

[0002] The principles of tunnel electrostatic purifiers and oil fume electrostatic purifiers are to use electrostatic action to purify air and oil fume. Specifically, the tunnel electrostatic purifier uses an electrostatic field to make charged particles move directionally under the action of the electric field force, and be collected or adsorbed on the electrode plates. At the same time, the subsequent deodorization device is used to remove the odor therein, and finally clean air is discharged. The oil fume electrostatic purifier makes the oil fume particles charged through the electrostatic field, then move directionally under the action of the electric field force and be adsorbed on the electrode plates. At the same time, most of the grease is collected through the flow equalizing plate and the oil collecting tray, and finally clean air is discharged. Currently, most of the tunnel electrostatic purifiers and oil fume electrostatic purifiers on the market operate in series with multiple ion boxes, and use the same high-voltage power supply to supply power to the serial ion boxes. Therefore, as long as there is a phenomenon of high-voltage arcing or low-voltage arcing in any ion box, the high-voltage power supply will automatically power off and stop working, entering the power-off protection state. At this time, the entire serial ion boxes cannot perform air purification operations, affecting the air purification efficiency and unable to ensure the safety of the on-site environment. Summary of the Invention

[0003] In view of various deficiencies of the prior art, a vortex electric field purification device and its design method are proposed herein.

[0004] To achieve the above object, the present invention provides the following technical solutions:

[0005] In a first aspect, the present invention provides a vortex electric field purification device, including a frame. Inside the frame, a dust collection area and an ionization area are arranged in parallel. Both the dust collection area and the ionization area include a plurality of electrode plates arranged parallel to and spaced from each other. The minimum distance between the high-voltage electrode plates in the dust collection area and the low-voltage electrode plates in the ionization area in a first direction is not less than the distance between the low-voltage electrode plates and the high-voltage electrode plates in the dust collection area in a second direction. The first direction is parallel to the direction from the air inlet side to the air outlet side of the purification device, the second direction is in the same horizontal plane as the first direction, and the second direction is perpendicular to the first direction.

[0006] Further, the minimum distance d2 between the low-voltage electrode plates in the ionization area and the low-voltage electrode plates in the dust collection area in the first direction is not less than the distance d1 between the high-voltage electrode plates and the low-voltage electrode plates in the dust collection area in the second direction.

[0007] Further, the distance between the high-voltage electrode plates and the low-voltage electrode plates in the ionization area in the second direction is d4, then d4≥4d2.

[0008] Further, the high-voltage plate and the low-voltage plate in the ionization region are respectively connected to a high-voltage power supply. An ionization electric field is formed between the high-voltage plate and the low-voltage plate in the ionization region. The high-voltage plate in the dust collection region is activated by the ionization electric field to generate a vortex electric field. The corresponding relationship between the absolute value of the induced voltage of the vortex electric field and d1 is as follows:

[0009] Absolute value of induced voltage / d1 = 0.7 - 1.3 kV / mm.

[0010] Further, the high-voltage plate in the ionization region is connected to the high-voltage end of the high-voltage power supply through a conductive rod. A relief hole for the conductive rod to pass through is provided on the low-voltage plate in the ionization region. The relief hole is a waist-shaped hole. The minimum diameter of the waist-shaped hole is D, and the absolute value of the voltage of the ionization electric field is U. Then D / U ≥ 2 mm / kV.

[0011] Further, air guide plates are provided at both the top and the bottom of the low-voltage plate in the ionization region. The air guide plates are inclined, and the distance between the end of the air guide plate close to the air inlet side of the purification device and the frame is smaller than the distance between the end of the air guide plate close to the air outlet side of the purification device and the frame.

[0012] Further, the distance between the ionization sawteeth on the high-voltage plate in the ionization region and the low-voltage plate in the second direction is not greater than the minimum distance between the ionization sawteeth and the air guide plate in the third direction. The third direction and the first direction are in the same vertical plane, and the third direction is perpendicular to the first direction.

[0013] Further, the bottom of the low-voltage plate in the ionization region is connected to the frame through a connecting plate. The height of the connecting plate is not greater than the height of the lower edge strip of the frame.

[0014] Further, in the ionization region, an installation hole for a first conductive rod to pass through is provided on the high-voltage plate. A first ionization sawtooth is provided on the side of the high-voltage plate close to the air inlet side of the purification device, and a second ionization sawtooth is provided on the side of the high-voltage plate close to the air outlet side of the purification device. The distance between the first ionization sawtooth and the installation hole in the first direction is used as the second distance, and the distance between the second ionization sawtooth and the installation hole in the first direction is used as the third distance. And the second distance is less than the third distance.

[0015] Further, the first ionization sawtooth and the second ionization sawtooth have the same structure, and the two are arranged in a staggered manner along the height direction of the purification device. The difference between the second distance and the third distance is 3 / 10 - 1 / 2 of the distance between adjacent second ionization sawteeth.

[0016] Further, the high-voltage plate in the ionization region and the two adjacent low-voltage plates form an ionization interval C1, and the high-voltage plate in the dust collection region and the two adjacent low-voltage plates form a dust collection interval C2. In the second direction, C1 ≥ 3C2.

[0017] Further, in the second direction, the distance between the high-voltage plate of the ionization region and the sawtooth tip near the air inlet side and the adjacent low-voltage plate is d5. In the first direction, the widths of both the high-voltage plate and the low-voltage plate in the ionization region are 3 times d5.

[0018] In a second aspect, the present invention also provides a design method for a vortex electric field purification device, including the following steps:

[0019] Based on the distance between the high-voltage plate and the low-voltage plate in the dust collection region in the second direction, obtain the induced voltage in the dust collection region and the minimum distance between the high-voltage plate in the dust collection region and the low-voltage plate in the ionization region in the first direction, and determine the position of the low-voltage plate in the ionization region in the first direction;

[0020] Based on the distance between the high-voltage plate and the low-voltage plate in the dust collection region in the second direction, obtain the distance between the high-voltage plate and the low-voltage plate in the ionization region in the first direction and the minimum distance between the high-voltage plate in the ionization region and the high-voltage plate in the dust collection region in the first direction, and combine the position of the low-voltage plate in the ionization region to determine the position of the high-voltage plate in the ionization region;

[0021] Based on the distance between the high-voltage plate and the low-voltage plate in the ionization region in the second direction, obtain the ionization electric field voltage in the ionization region.

[0022] Further, the distance between the high-voltage plate and the low-voltage plate in the ionization region in the second direction is d4, then 0.5 kV / mm ≤ |ionization electric field voltage in the ionization region| / d4 ≤ 1 kV / mm.

[0023] The beneficial effects of the present invention are:

[0024] The high-voltage plate in the dust collection region protrudes towards the ionization region, adjusting the distance from the high-voltage plate in the dust collection region to the low-voltage plate in the ionization region. The dust collection region can generate a vortex electric field through the ionization electric field in the ionization region. At the same time, it can avoid the phenomenon of arcing or sparking in the dust collection region, with high reliability, good safety, economic durability. When multiple vortex electric field purification devices are connected in series, if a certain vortex electric field purification device fails, it does not affect the normal operation of the other vortex electric field purification devices, and can ensure that the efficiency will not suddenly fail completely within a controllable range, so that when one purification device fails, it will not cause all other purification devices to stop working and affect the efficiency of the entire purification system. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] Figure 1 is an axonometric view of the vortex electric field purification device in an embodiment of the present invention;

[0026] Figure 2 is a side view of the vortex electric field purification device in an embodiment of the present invention;

[0027] Figure 3It is a flowchart of the design method of the vortex electric field purification device in the embodiment of the present invention.

[0028] In the drawings: 1, frame; 2, ionization zone; 3, dust collection zone; 4, air guide plate; 5, mounting hole; 6, first ionization sawtooth; 7, second ionization sawtooth. Detailed implementation manners

[0029] In order to enable those skilled in the art to better understand the technical solutions of the present invention, the technical solutions of the present invention will be clearly and completely described below in conjunction with the drawings of the present invention. Based on the embodiments in the present application, other similar embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the scope of protection of the present application. In addition, the directional terms mentioned in the following embodiments, such as "upper", "lower", "left", "right", etc. are only with reference to the directions of the drawings. Therefore, the directional terms used are for illustration rather than to limit the present invention.

[0030] According to an embodiment of the present invention, a vortex electric field purification device is provided. Please refer to Figure 1 , including a frame 1. Inside the frame 1, a dust collection zone 3 and an ionization zone 2 are arranged in parallel. Both the dust collection zone 3 and the ionization zone 2 include a plurality of plates arranged parallel to each other and at intervals. The minimum distance between the high-voltage plates of the dust collection zone 3 and the low-voltage plates of the ionization zone 2 in the first direction is not less than the distance between the low-voltage plates and the high-voltage plates of the dust collection zone 3 in the second direction. The first direction is parallel to the direction from the air inlet side to the air outlet side of the purification device. The second direction is in the same horizontal plane as the first direction and is perpendicular to the first direction.

[0031] In the vortex electric field purification device of this embodiment, please refer to Figure 1 , the minimum distance d2 between the low-voltage plates of the ionization zone 2 and the low-voltage plates of the dust collection zone 3 in the first direction is not less than the distance d1 between the high-voltage plates and the low-voltage plates of the dust collection zone 3 in the second direction. The distance between the high-voltage plates and the low-voltage plates of the ionization zone 2 in the second direction is d4, then d4≥4d2. The inventor found through testing that when d4≥4d2, the vortex electric field purification device can well meet the electrical safety and purification efficiency; when d4<4d2, the vortex electric field purification device is prone to arc ignition or flashover, with low purification efficiency and does not meet the actual operation requirements, fully considering the factors of electrical safety and purification efficiency.

[0032] Preferably, the minimum distance d3 between the low-voltage plates of the ionization zone 2 and the high-voltage plates of the dust collection zone 3 in the first direction satisfies 1.5d1≤d3≤2.5d1. Similarly, 1.5d1≤d2≤2.5d1.

[0033] In order to better ensure purification efficiency, electrical safety, and induced voltage, while taking into account the product stability in the initial and later stages of operation, a comparative test was conducted. It was found that when the minimum distance d3 in the first direction between the low-voltage electrode plate in the ionization region 2 and the high-voltage electrode plate in the dust collection region 3 satisfies 1.5d1 ≤ d3 ≤ 2.5d1, the overall performance is the best; similarly, when 1.5d1 ≤ d2 ≤ 2.5d1, the overall purification effect and electrical performance are better than those outside this range.

[0034] In the vortex electric field purification device of this embodiment, please refer to Figure 1 , the high-voltage electrode plate and the low-voltage electrode plate in the ionization region 2 are respectively connected to a high-voltage power supply. An ionization electric field is formed between the high-voltage electrode plate and the low-voltage electrode plate in the ionization region 2. The high-voltage electrode plate in the dust collection region 3 is activated by the ionization electric field to generate a vortex electric field. The corresponding relationship between the absolute value of the induced voltage of the vortex electric field and d1 is:

[0035] Absolute value of induced voltage / d1 = 0.7 - 1.3 kV / mm.

[0036] It should be noted that the inventor, on the premise of comprehensively considering the primary purification efficiency of particulate matter and electrical safety, conducted a systematic test experiment on the corresponding relationship between the absolute value of the induced voltage and d1 based on vortex electric field purification devices with the same external dimensions and under the same environmental operating parameter conditions. The experimental results are shown in Table 1.

[0037] Table 1:

[0038]

[0039] It can be seen from Table 1 that when the absolute value of the induced voltage / d1 is less than 0.7, no arcing or flashover phenomenon occurs in the dust collection region. However, the primary purification efficiency of particulate matter is lower than 90%; when the absolute value of the induced voltage / d1 is 1.4, an arcing phenomenon occurs in the dust collection region, and at the same time, the primary purification efficiency of particulate matter is lower than 30%.

[0040] In the vortex electric field purification device of this embodiment, please refer to Figure 1 , the high-voltage electrode plate in the ionization region 2 is connected to the high-voltage end of the high-voltage power supply through a conductive rod. A relief hole for the conductive rod to pass through is opened on the low-voltage electrode plate in the ionization region 2. The relief hole is a waist-shaped hole, and the minimum diameter of the waist-shaped hole is D. The absolute value of the voltage of the ionization electric field is U, and D / U ≥ 2 mm / kV.

[0041] It should be noted that, on the premise of comprehensively considering the primary purification efficiency of particulate matter and electrical safety, the inventor conducted a systematic test experiment on the corresponding relationship of D / U based on a vortex electric field purification device with the same external dimensions and under the same environmental operating parameter conditions, and obtained that D / U≥2mm / kV can balance electrical safety and particulate matter purification efficiency to meet the actual operating requirements; when D / U<2mm / kV, the ionization area is also very safe, without arcing and flashover phenomena. However, the primary purification efficiency of particulate matter is significantly lower than 90%, which does not meet the actual purification requirements.

[0042] In the vortex electric field purification device of this embodiment, please refer to Figure 1 , air guiding plates 4 are provided at the top and bottom of the low-voltage plate of the ionization area 2. The air guiding plates 4 are inclined, and the distance between the end of the air guiding plate 4 close to the air inlet side of the purification device and the frame 1 is smaller than the distance between the end of the air guiding plate 4 close to the air outlet side of the purification device and the frame 1.

[0043] Specifically, the distance between the ionization sawteeth on the high-voltage plate and the low-voltage plate in the ionization area 2 in the second direction is not greater than the minimum distance between the ionization sawteeth and the air guiding plate 4 in the third direction. The third direction is in the same vertical plane as the first direction, and the third direction is perpendicular to the first direction.

[0044] It should be noted that on the basis of verifying the electrical clearance, the structure of the air guiding plate 4 is optimized, which can not only ensure that the ionization voltage will not break down, but also ensure that the air entering the ionization area converges and all flows towards the dust collection area.

[0045] In the vortex electric field purification device of this embodiment, please refer to Figure 1 , the bottom of the low-voltage plate of the ionization area 2 is connected to the frame 1 through a connecting plate, and the height of the connecting plate is not greater than the height of the lower edge strip of the frame 1.

[0046] It should be noted that the connecting plate helps to fix the low-voltage plate of the ionization area. The height of the connecting plate is not greater than the height of the lower edge strip of the frame, achieving the effects of not blocking the wind, low resistance, and high space utilization rate.

[0047] In the vortex electric field purification device of this embodiment, please refer to Figure 1 、 Figure 2 , in the ionization area 2, mounting holes 5 for the first conductive rod to pass through are provided on the high-voltage plate. The side of the high-voltage plate close to the air inlet side of the purification device is provided with first ionization sawteeth 6, and the side of the high-voltage plate close to the air outlet side of the purification device is provided with second ionization sawteeth 7. The distance between the first ionization sawteeth 6 and the mounting hole 5 in the first direction is used as the second distance, and the distance between the second ionization sawteeth 7 and the mounting hole 5 in the first direction is used as the third distance, and the second distance is less than the third distance.

[0048] In the vortex electric field purification device of this embodiment, please refer toFigure 1 The first ionization sawtooth 6 and the second ionization sawtooth 7 have the same structure, and the two are arranged staggeredly along the height direction of the purification device. The difference between the second spacing and the third spacing is 3 / 10 - 1 / 2 of the spacing between adjacent second ionization sawteeth 7. The closer the high-voltage plate of the ionization region 2 is to the dust collection region 3, the higher the induced voltage, and the higher the primary purification efficiency of particulate matter. However, when the distance is close to a certain extent, it is not easy to control electrical safety.

[0049] Based on the same dust collection region, the inventor designed different ionization regions for efficiency test experiments and found that when the difference between the second spacing and the third spacing is 3 / 10 - 1 / 2 of the spacing between adjacent second ionization sawteeth, the primary purification efficiency of particulate matter can be > 90%, meeting the actual operation requirements. The experimental results are shown in Table 3.

[0050] Table 3:

[0051]

[0052] It can be seen from Table 3 that by designing the high-voltage plate of the ionization region close to the dust collection region, the induced voltage can be increased, the purification efficiency can be improved, and the maintenance cycle can be increased.

[0053] In the vortex electric field purification device of this embodiment, please refer to Figure 1 , the high-voltage plate of the ionization region 2 and the two adjacent low-voltage plates form an ionization interval C1, and the high-voltage plate of the dust collection region 3 and the two adjacent low-voltage plates form a dust collection interval C2. In the second direction, C1 ≥ 3C2. The ionization region requires a higher voltage to ionize the air so that the passing particulate matter is charged, and the dust collection region needs to design a reasonable voltage to capture the charged particulate matter. After testing, it is found that when C1 ≥ 3C2, good purification effect and electrical safety can be achieved. When C1 < 3C2, the purification performance and electrical safety are not good, which is not conducive to the performance stability of long-term operation and maintaining electrical safety.

[0054] According to an embodiment of the present invention, a design method for a vortex electric field purification device is provided. Please refer to Figure 3 , including the following steps:

[0055] According to the spacing between the high-voltage plate and the low-voltage plate of the dust collection region in the second direction, obtain the induced voltage of the dust collection region and the minimum distance between the high-voltage plate of the dust collection region and the low-voltage plate of the ionization region in the first direction, and determine the position of the low-voltage plate of the ionization region in the first direction;

[0056] According to the spacing between the high-voltage plate and the low-voltage plate of the dust collection region in the second direction, obtain the distance between the high-voltage plate and the low-voltage plate of the ionization region in the first direction and the minimum spacing between the high-voltage plate of the ionization region and the high-voltage plate of the dust collection region in the first direction, and combine the position of the low-voltage plate of the ionization region to determine the position of the high-voltage plate of the ionization region;

[0057] The ionization electric field voltage of the ionization region is obtained according to the distance between the high-voltage plate and the low-voltage plate of the ionization region in the second direction.

[0058] Preferably, the distance between the high-voltage plate and the low-voltage plate of the ionization region is 24 mm, the distance between the high-voltage plate and the low-voltage plate of the dust collection region is 6 mm, the absolute value of the ionization electric field voltage is 12 kV, the absolute value of the induced voltage is 6 kV, and the primary purification efficiency of the particulate matter is optimal.

[0059] In the design method of the vortex electric field purification device of this embodiment, if the distance between the high-voltage plate and the low-voltage plate of the ionization region in the second direction is d4, then 0.5 kV / mm ≤ the absolute value of the ionization electric field voltage of the ionization region / d4 ≤ 1 kV / mm.

[0060] It should be noted that the inventor designed different ionization regions based on the same dust collection region to conduct experiments on the primary purification efficiency of particulate matter, and found that when 0.5 kV / mm ≤ the absolute value of the ionization electric field voltage of the ionization region / d4 ≤ 1 kV / mm, the primary purification efficiency of particulate matter can be > 90%, which meets the actual operation requirements. The experimental results are shown in Table 4.

[0061] Table 4:

[0062]

[0063]

[0064] The present invention has been described in detail above. The above description is only a preferred embodiment of the present invention, and it cannot limit the scope of the present invention. That is, all equivalent changes and modifications made according to the scope of this application should still fall within the scope covered by the present invention.

Claims

1. A vortex electric field purification device, characterized in that It includes a frame. Inside the frame, a dust collection area and an ionization area are arranged in parallel. Both the dust collection area and the ionization area include a number of plates that are parallel to each other and arranged at intervals. The minimum distance between the high-voltage plate of the dust collection area and the low-voltage plate of the ionization area in the first direction is not less than the distance between the low-voltage plate and the high-voltage plate of the dust collection area in the second direction. The first direction is parallel to the direction from the air inlet side to the air outlet side of the purification device. The second direction is in the same horizontal plane as the first direction and perpendicular to the first direction. The distance between the high-voltage plate and the low-voltage plate of the dust collection area in the second direction is d1. The minimum distance d2 between the low-voltage plate of the ionization area and the low-voltage plate of the dust collection area in the first direction is not less than the distance d1 between the high-voltage plate and the low-voltage plate of the dust collection area in the second direction. The distance between the high-voltage plate and the low-voltage plate of the ionization area in the second direction is d4, then d4≥4d2. The high-voltage plate and the low-voltage plate of the ionization area are respectively connected to the high-voltage power supply. An ionization electric field is formed between the high-voltage plate and the low-voltage plate of the ionization area. The high-voltage plate of the dust collection area is activated by the ionization electric field to generate a vortex electric field. The corresponding relationship between the absolute value of the induced voltage of the vortex electric field and d1 is: absolute value of induced voltage / d1 = 0.7 - 1.3 kV / mm.

2. The vortex electric field purification device according to claim 1, characterized in that, The high-voltage plate of the ionization area is connected to the high-voltage end of the high-voltage power supply through a conductive rod. A relief hole for the conductive rod to pass through is opened on the low-voltage plate of the ionization area. The relief hole is set as an oval hole. The minimum diameter of the oval hole is D. The absolute value of the voltage of the ionization electric field is U, then D / U≥2 mm / kV.

3. A vortex electric field purification device according to claim 1, wherein Air guide plates are provided at the top and bottom of the low-voltage plate of the ionization area. The air guide plates are inclined, and the distance between the end of the air guide plate close to the air inlet side of the purification device and the frame is less than the distance between the end of the air guide plate close to the air outlet side of the purification device and the frame.

4. The vortex electric field purification device according to claim 3, characterized in that, The distance between the ionization sawteeth on the high-voltage plate of the ionization area and the low-voltage plate in the second direction is not greater than the minimum distance between the ionization sawteeth and the air guide plate in the third direction. The third direction is in the same vertical plane as the first direction and perpendicular to the first direction.

5. A vortex electric field purification device according to claim 1, characterized in that, The bottom of the low-voltage plate of the ionization area is connected to the frame through a connecting plate. The height of the connecting plate is not greater than the height of the lower edge strip of the frame.

6. The vortex electric field purification device according to claim 1, wherein In the ionization area, an installation hole for a first conductive rod to pass through is opened on the high-voltage plate. The first ionization sawteeth are provided on the side of the high-voltage plate close to the air inlet side of the purification device. The second ionization sawteeth are provided on the side of the high-voltage plate close to the air outlet side of the purification device. The distance between the first ionization sawteeth and the installation hole in the first direction is used as the second distance. The distance between the second ionization sawteeth and the installation hole in the first direction is used as the third distance, and the second distance is less than the third distance.

7. The vortex electric field purification device according to claim 6, characterized in that, The first ionization sawteeth and the second ionization sawteeth have the same structure and are arranged in a staggered manner along the height direction of the purification device. The difference between the second distance and the third distance is 3 / 10 - 1 / 2 of the distance between adjacent second ionization sawteeth.

8. The vortex electric field purification device according to claim 1, characterized in that, The high-voltage plate of the ionization area and the two adjacent low-voltage plates form an ionization interval C1. The high-voltage plate of the dust collection area and the two adjacent low-voltage plates form a dust collection interval C2. In the second direction, C₁≥3C₂.

9. A vortex electric field purification device according to claim 1, characterized in that, In the second direction, the distance between the high-voltage plate of the ionization region and the sawtooth tip on the air inlet side and the adjacent low-voltage plate is d5. In the first direction, the widths of both the high-voltage plate and the low-voltage plate in the ionization region are 3 times d5.

10. A design method for a vortex electric field purification device as described in any one of claims 1-9, comprising the following steps: Based on the distance between the high-voltage plate and the low-voltage plate in the second direction in the dust collection region, obtain the induced voltage in the dust collection region and the minimum distance between the high-voltage plate in the dust collection region and the low-voltage plate in the ionization region in the first direction, and determine the position of the low-voltage plate in the ionization region in the first direction; Based on the distance between the high-voltage plate and the low-voltage plate in the second direction in the dust collection region, obtain the distance between the high-voltage plate and the low-voltage plate in the ionization region in the first direction and the minimum distance between the high-voltage plate in the ionization region and the high-voltage plate in the dust collection region in the first direction, and in combination with the position of the low-voltage plate in the ionization region, determine the position of the high-voltage plate in the ionization region; Based on the distance between the high-voltage plate and the low-voltage plate in the second direction in the ionization region, obtain the ionization electric field voltage in the ionization region.

11. A design method of a vortex electric field purification device according to claim 10, characterized in that If the distance between the high-voltage plate and the low-voltage plate in the ionization region in the second direction is d4, then 0.5 kV / mm ≤ |ionization electric field voltage in the ionization region| / d4 ≤ 1 kV / mm.

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