A method for making the static elimination performance of the ion rods consistent in the horizontal air outlet directions on both sides at the same vertical distance

Abstract

A method for making the static elimination performance of the two horizontal air outlet directions of an ion bar consistent at the same vertical distance belongs to the field of static elimination. The air duct in the electrode base consists of an air inlet section, a mixing section, a contraction section, a throat and an expansion section connected in sequence; the end of the expansion section forms the air outlet of the electrode base air duct; the air outlet of the air duct is a flared opening structure; the air duct of the electrode base adopts an air flow acceleration structure mode of first contraction and then expansion, which reduces the air duct volume and plays a role in accelerating the air flow velocity at the air outlet of the air duct; due to the increase in the jet angle of the air outlet of the air duct, a wider static elimination range can be obtained. By changing the air duct structure of the electrode base, the output state of the ionized air flow of each discharge electrode assembly is improved, so that the output air volume of each discharge electrode assembly of the ion bar is uniform along its length direction, and the air flow movement states of each discharge electrode assembly in the horizontal direction on both sides of the ion bar are consistent at the same vertical test distance, and a more balanced and faster static elimination effect can be achieved.

Description

Technical Field

[0001] The present invention belongs to the field of static elimination, and particularly relates to a method for making the static elimination performance of a rod-shaped static eliminator consistent. Background Art

[0002] An ion rod is a static eliminator that neutralizes static charges on the surface of a charged object by delivering positive and negative ions to the charged object. The way it delivers ions is basically divided into two types. One is that under the action of the combined electric field force of the high-voltage electric field generated by the discharge electrode and the charge field formed by the opposite charges on the surface of the charged object, it is delivered to the surface of the charged object. The biggest defect of this method is that the ion delivery distance is relatively short. When the distance exceeds 15 cm, its delivery ability is significantly weakened. The other is to use externally connected compressed air (also known as compressed air flow, simply referred to as air flow) to blow out from near the discharge electrode, and quickly deliver the positive and negative ions generated at the discharge electrode to the surface of the charged object.

[0003] For example, the Chinese utility model patent "A high-power ion rod" (authorization announcement date: March 7, 2012, authorization announcement number: CN 202160327 U) previously applied by the applicant is a static elimination device adopting the working mode of the second type above. It adopts a long strip-shaped rod structure. The compressed air input from the on-site compressed air main pipe enters from one end of the ion rod, and is transmitted through the ventilation holes or air channels arranged in the rod body to the air outlet holes at each discharge electrode, and the compressed air is output outward to form an air flow, and quickly delivers the positive and negative ions generated at the discharge electrode to the surface of the charged object.

[0004] In the actual use process, it is found that the structural design of the discharge electrode assembly of such ion rods has a great influence on the delivery state of the compressed air flow, and thus has an important influence on the static elimination performance of the ion rods.

[0005] Due to the unreasonable structural design of the discharge electrode assembly of the existing ion rods, the following phenomena will occur:

[0006] 1. As shown in Figure 1 , the compressed air (labeled as compressed air flow input a in the figure) is input into the ion rod through the total air inlet end (labeled as the gas source joint b with a throttle valve in the figure), and is transported to each discharge electrode assembly c through the total air supply pipe, and the compressed air is output outward through the air outlet holes at the discharge electrode to form an air flow.

[0007] When the total input pressure of compressed air is constant, along the length direction of the ion rod, due to the phenomenon of a decreasing air pressure gradient of compressed air, the output air flow rates at each air outlet are uneven. The output air flow rate of the air outlet closer to the total air inlet end (the left end in the figure) is large, while the output air flow rate of the air outlet farther from the total air inlet end is small. As a result, the charge dissipation performance at both ends of the ion rod at the same vertical position (represented by a distance of 300 in the figure), that is, the end closer to the total air inlet end and the end farther from the total air inlet end, namely the left end and the right end of the ion rod in the figure, is inconsistent. Specifically, the charge dissipation time is fast or slow (which means that the amount of positive and negative ions received by the first flat plate charge tester P1 on the left side in the figure is more than that received by the third flat plate charge tester P3 on the right side), and the balance voltage is high or low.

[0008] 2. As Figure 2 shown, when the total input pressure of compressed air is constant, the output air flow state at the same discharge electrode assembly is disordered. At the same vertical test distance, due to the different air flow speeds of the two ends of the ion rod in the horizontal direction (which means that the amount of positive and negative ions received by the flat plate charge tester P4 in front of the rod and the flat plate charge tester P5 behind the rod in the figure are not equal or not close), the charge dissipation time is inconsistent.

[0009] 3. The air flow consumption is large and the air flow pressure drop is too large, resulting in a decrease in air flow speed and a slow charge dissipation time.

[0010] More specifically, as Figures 9a to 9c 、 Figure 10 shown, the airway designs in the existing electrode holder 6 are all circular or square straight-through airways 3-0, and no air flow acceleration structure is provided at the end of the straight-through airway (this is also the reason for the name of the straight-through airway). The problem easily caused by the square straight-through airway is that since the cross-section of the discharge electrode is circular and the cross-section of the airway is square, the air flow flows out from the 4 right angles of the square hole, the air flow state is disordered, and the air flow distribution is uneven, resulting in very weak air flow in some directions and very strong air flow in some directions, causing a large deviation in the charge dissipation performance in the corresponding directions. For example, the charge dissipation speed in the direction with weak air flow is very slow, and the charge dissipation speed in the direction with strong air flow is very fast, and the balance voltage fluctuates greatly. For the circular straight-through airway, the air flow cannot be accelerated, resulting in the inability to increase the charge dissipation speed; although the air flow distribution in all directions of the circular straight-through airway is relatively uniform, due to the limitation of its straight-through structure, a relatively wide charge dissipation range cannot be obtained. Summary of the Invention

[0011] The technical problem to be solved by the present invention is to provide a method for making the static elimination performance of the two horizontal air outlet positions of the ion bar consistent at the same vertical distance. By optimizing the air intake structure, air duct structure, and air outlet structure, the output state of the ionized air flow is improved, so that the air output volume of the ion bar is uniform along its length direction. At the same vertical test distance, the air flow movement states of the two horizontal directions of the ion bar are consistent, and the air flow consumption can be reduced under the same air source pressure, the air flow speed can be increased, a more balanced and faster static elimination effect can be obtained, and a larger static elimination range with a larger angle can be obtained.

[0012] The technical solution of the present invention is: to provide a method for making the static elimination performance of the two horizontal air outlet positions of the ion bar consistent at the same vertical distance, and its characteristics are:

[0013] A plurality of discharge electrode assemblies are arranged on the ion bar along the length direction of the ion bar; the discharge electrode assembly includes a discharge electrode, an electrode sleeve, and an electrode seat; the discharge electrode is sleeved with the electrode sleeve, and the head end of the electrode sleeve is connected to the electrode seat; an air duct is arranged in the electrode seat along the longitudinal central axis; the air duct includes an air intake section, a mixing section, a contraction section, a throat, and an expansion section connected in sequence; the end of the expansion section constitutes the air duct outlet of the electrode seat; the air duct outlet is a flared opening structure;

[0014] The air duct of the electrode seat adopts an air flow acceleration structure mode of first contracting and then expanding, which reduces the air duct volume and plays a role in accelerating the air flow velocity at the air duct outlet; and due to the increase in the ejection angle of the air duct outlet, a wider static elimination range can be obtained;

[0015] By changing the structure of the air duct of the electrode seat, the output state of the ionized air flow of each discharge electrode assembly is improved, so that the air output volume of each discharge electrode assembly of the ion bar is uniform along its length direction. At the same vertical test distance, the air flow movement states of each discharge electrode assembly in the two horizontal directions of the ion bar are consistent; and the air flow consumption can be reduced under the same air source pressure, the air flow speed can be increased, and a more balanced and faster static elimination effect can be obtained.

[0016] Specifically, in the air duct, the expansion angle α of the expansion section is smaller than the contraction angle β of the contraction section.

[0017] Further, the curvature radii of the contraction section, expansion section, and throat of the air duct are the same.

[0018] The overall structure of the discharge electrode is needle-shaped, cylindrical rod-shaped, or circular tube-shaped; the discharge electrode is inserted into the electrode sleeve; the discharge electrode and the electrode sleeve are in interference fit.

[0019] The overall structure of the electrode sleeve is a cylindrical structure; the head end of the electrode sleeve is inserted into the electrode seat.

[0020] Further, at the first-end part of the electrode sleeve inserted into the electrode base, four electrode-sleeve protruding arms are provided, which are equally angularly separated from each other; between two adjacent electrode-sleeve protruding arms, an adjacent gap is provided; the middle part of the electrode sleeve protrudes in a frustum-of-a-cone shape, and at the bottom of the protruding frustum of a cone, four electrode-sleeve air-inlet gaps are provided, which are equally angularly separated from each other; the four electrode-sleeve air-inlet gaps communicate with the adjacent gaps between the four electrode-sleeve protruding arms respectively; compressed air flows into the air passage in the electrode base through the air-inlet gaps and the adjacent gaps.

[0021] Specifically, the electrode base includes an air passage arranged along the longitudinal central axis; at the flared opening at the front of the electrode base and around the opening, four electrode-base peripheral ribs are equally angularly separated; at the rear of the electrode base, an externally threaded mounting post is provided; the end face of the air outlet of the electrode base, the top face of the externally threaded mounting post, and the end face at the lower part of the protruding cylindrical platform of the electrode sleeve are parallel to each other; the discharge electrode is located at the central position of the air passage.

[0022] Further, the cross-section of the air passage along the transverse axis is circular.

[0023] Furthermore, the parameters of the air passage structure are determined according to the following two formulas:

[0024]

[0025]

[0026] Among them, D 出气口 is the diameter of the air outlet at the end face of the electrode base, D 出气口端面电极径向截面 is the radial cross-section diameter of the discharge electrode on the plane where the end face of the air outlet of the electrode base is located, D 候口 is the throat diameter, D 喉口端面电极径向截面 is the radial cross-section diameter of the discharge electrode on the plane where the throat end face of the electrode base is located, P 入 is the air flow pressure at the inlet of the air passage contraction section of the electrode base; n is the number of air outlets, S 进 is the area of the air inlet of the ion rod air cavity.

[0027] Compared with the prior art, the advantages of the present invention are:

[0028] 1. In the present technical solution, due to the optimized control of the air outlet area of the air passage, the air flow rates output by the air outlets in the length direction of the ion rod are uniform and stable, so that the charge dissipation performances at both ends of the ion rod at the same vertical position are consistent, and the charge dissipation times are consistent, and a wider charge dissipation range can be obtained.

[0029] 2. In this technical solution, since the air ducts of the electrode base are all circular in the transverse cross-section, and the end face of the air outlet, the top face of the threaded mounting post of the electrode base, and the lower end face of the convex cylinder of the electrode sleeve are parallel to each other, the discharge electrode is located at the center of the air duct. Thus, it is ensured that the flow states of the output air flow at the two sides of the ion bar of the discharge electrode assembly are consistent. At the same vertical test distance, the air flow velocities in the horizontal direction on both sides of the ion bar are the same, and the charge dissipation performance is consistent.

[0030] 3. Compared with the existing straight-through air duct design, this technical solution significantly reduces the air duct volume and sets an air flow acceleration structure that first contracts and then expands. This design significantly reduces the air flow consumption, keeps the air flow pressure drop basically unchanged, greatly improves the air flow velocity, and significantly increases the charge dissipation speed. Description of the Drawings

[0031] Figure 1 is a test schematic diagram in the length direction of the ion bar;

[0032] Figure 2 is a test schematic diagram in the horizontal direction on both sides of the ion bar;

[0033] Figure 3a 、 Figure 3b is a structural schematic diagram of the discharge electrode of the present invention;

[0034] Figures 4a to 4d is a structural schematic diagram of the electrode sleeve of the present invention;

[0035] Figures 5a to 5d is a structural schematic diagram of the electrode base of the present invention;

[0036] Figure 6 is a schematic diagram of the air duct structure inside the electrode base of the present invention;

[0037] Figure 7 is a partial structural schematic diagram of the air duct contraction and expansion section of the present invention;

[0038] Figure 8 is a combined structural schematic diagram of the discharge electrode assembly of the present invention;

[0039] Figure 9a is a schematic diagram of the existing electrode base structure;

[0040] Figure 9b is Figure 9a the A-direction sectional view of

[0041] Figure 9c is Figure 9a the B-direction sectional view of

[0042] Figure 10 is a combined structural schematic diagram of the existing discharge electrode assembly.

[0043] In the figure, a is the input of compressed air flow, b is the air source joint with a throttle valve, c is the discharge electrode assembly, P1 to P3 are the first to third flat charge testers, P4 is the flat charge tester in front of the rod, and P5 is the flat charge tester behind the rod;

[0044] 1 is the discharge electrode, 2 is the electrode sleeve, 2-1 is the air inlet gap of the electrode sleeve, 2-2 is the protruding arm of the electrode sleeve, 3 is the electrode seat, 3-1 is the air inlet section of the air passage of the electrode seat, 3-2 is the mixing section of the air passage of the electrode seat, 3-3 is the contraction section of the air passage of the electrode seat, 3-4 is the throat of the air passage of the electrode seat, 3-5 is the expansion section of the air passage of the electrode seat, 3-6 is the external thread mounting post of the electrode seat, 3-7 is the peripheral rib of the electrode seat, 3-8 is the air passage, 4 is the existing discharge electrode, 5 is the existing discharge electrode clamp, 6 is the existing electrode seat, and 3-0 is the direct air passage;

[0045] α is the expansion angle, β is the contraction angle, D1 is the throat diameter, D2 is the radial cross-sectional diameter of the discharge electrode in the plane where the throat end face is located, D3 is the radial cross-sectional diameter of the discharge electrode in the plane where the outlet end face of the electrode seat is located, and D4 is the outlet diameter of the electrode seat. Specific embodiments

[0046] The present invention will be further described below with reference to the accompanying drawings and embodiments.

[0047] The technical solution of the present invention provides a method for making the charge elimination performance of the two horizontal air outlet positions on both sides of the ion bar consistent at the same vertical distance. The invention point lies in:

[0048] A plurality of discharge electrode assemblies are arranged on the ion bar along the length direction of the ion bar; the discharge electrode assembly includes a discharge electrode 1, an electrode sleeve 2, and an electrode seat 3; the discharge electrode is sleeved with the electrode sleeve, and the head end of the electrode sleeve is connected to the electrode seat; an air passage 3-8 is arranged in the electrode seat along the longitudinal central axis; the air passage includes an air inlet section 3-1, a mixing section 3-2, a contraction section 3-3, a throat 3-4, and an expansion section 3-5 that are connected in sequence; the end of the expansion section constitutes the air passage outlet of the electrode seat; the air passage outlet is a flared opening structure.

[0049] In the technical solution of the present invention, the air passage of the electrode seat adopts an air flow acceleration structure mode of first contraction and then expansion, which reduces the air passage volume and plays a role in accelerating the air flow velocity at the air passage outlet; and due to the increase in the air passage outlet injection angle, a wider charge elimination range can be obtained.

[0050] The technical solution of the present invention improves the output state of the ionized air flow of each discharge electrode assembly by changing the structure of the air duct of the electrode base, so that the air output of each discharge electrode assembly of the ion bar is uniform along its length direction, and the air flow movement states of each discharge electrode assembly in the horizontal direction on both sides of the ion bar are the same at the same vertical test distance; and it can reduce the air flow consumption under the same air source pressure, increase the air flow speed, and achieve a more balanced static elimination effect.

[0051] Specifically, in the technical solution of the present invention, the structural dimensions of the discharge electrode 1 only need to match the electrode sleeve and the electrode base, and it can be in the shape of a needle, a cylindrical rod, or a circular tube. In this specification, the needle-shaped structure is used as an example for illustration. See specifically Figure 3a 、 Figure 3b as shown in.

[0052] The diameter of the discharge electrode can be slightly larger than the inner diameter of the electrode sleeve 2, or concave points can be machined on the electrode sleeve to achieve an interference fit between the discharge electrode and the concave points inside the electrode sleeve (see Figure 4c as shown in).

[0053] Refer to Figures 4a to 4d ( Figure 4a is the bottom view of the electrode sleeve, Figure 4B is the Figure 4a A-A cross-sectional view of, Figure 4c is the external structure schematic diagram of the electrode sleeve, Figure 4d is the three-dimensional view of the electrode sleeve) as shown in. In this technical solution, the lower part of the electrode sleeve 2 has 4 electrode sleeve extension arms 2-2 (referred to as metal arms) extending forward. The 4 metal arms have the same structural dimensions and are equally angled within the same circular end face; 4 mutually separated electrode sleeve air intake gaps 2-1 (referred to as air intake gaps) are equally angled at the bottom of the convex cylinder in the middle of the electrode sleeve. The 4 air intake gaps have the same structural dimensions, and the gaps between these 4 air intake gaps and the above-mentioned 4 metal arms are connected, and the width of each gap is the same.

[0054] Refer to Figures 5a to 5d ( Figure 5a is the bottom view structural schematic diagram of the electrode base, Figure 5b is for Figure 5a the sectional view of the A-A section in, Figure 5c is the side view structural schematic diagram of the electrode base, Figure 5d is the three-dimensional schematic diagram of the electrode base) as shown in. In the technical solution of the present invention, the electrode base 3 includes an air duct 3-8 arranged along the longitudinal central axis. Four electrode base peripheral ribs 3-7 (referred to as peripheral ribs) are equally angled at the horn-shaped opening at the front of the electrode base and around the opening. An electrode base external thread mounting post 3-6 (referred to as an external thread mounting post) is arranged at the rear of the electrode base. The electrode base is mechanically installed with the ion bar air cavity through the external thread mounting post.

[0055] Combined with Figure 6, Figure 7 As can be seen from the figure, the air ducts of the electrode base are all circular in the transverse cross-section. The air ducts of the electrode base include an electrode base air duct intake section 3-1 (abbreviation: intake section), an electrode base air duct mixing section 3-2 (abbreviation: mixing section), an electrode base air duct contraction section 3-3 (abbreviation: contraction section), an electrode base air duct throat 3-4 (abbreviation: throat), and an electrode base air duct expansion section 3-5 (abbreviation: expansion section) that are connected in sequence. The following will explain them respectively:

[0056] 1. Intake section 3-1:

[0057] The function of the intake section is to introduce the compressed air flow entering through the intake gap of the electrode sleeve, and to prepare for the air flow mixing and acceleration in the contraction section.

[0058] 2. Mixing section 3-2:

[0059] A smooth transition is required between the intake section 3-1 and the contraction section 3-3 to avoid stress concentration inside the air duct of the electrode base during processing, which may affect the service life of the electrode base under high-voltage electric fields.

[0060] The transitional part between the intake section and the contraction section is the mixing section 3-2.

[0061] The mixing section has a convex structure relative to the air duct, so a certain vortex will be generated here. This vortex plays a role in mixing the compressed air flow flowing in from the 4 intake gaps, making the compressed air flow evenly cover the entire surface of the discharge electrode.

[0062] 3. Contraction section 3-3:

[0063] The function of the contraction section is to accelerate the flow velocity of the compressed air flow in the intake section. The transition from the contraction section to the throat should be smooth and gentle.

[0064] Figure 7 The size of the contraction angle β shown in the figure will affect the air flow acceleration. If it is too large, it is easy to cause severe vortices in the air duct, making the air flow extremely unstable, and finally resulting in unstable charge dissipation performance (the charge dissipation speed is sometimes fast and sometimes slow, and the equilibrium voltage is sometimes high and sometimes low); if it is too small, the air flow acceleration distance will be too long, resulting in too thick boundary layer and increased energy loss. To make the air flow accelerate stably, the contraction angle β is generally preferably between 30° and 90°, and it is more preferably 90°.

[0065] 4. Throat 3-4:

[0066] To accelerate the air flow velocity to the greatest extent, the contraction section, the expansion section, and the throat are set to have the same radius of curvature, that is, the length of the throat is zero.

[0067] 5. Expansion section 3-5:

[0068] The structure of the expansion section has a great influence on the transport state of ions. If the expansion angle α is too large, it is easy to cause the jet to diffuse relatively quickly, and the charge dissipation speed in the vertical distance becomes slower; while if the expansion angle α is too small, the gas channel is too long, which will lead to an overly thick boundary layer, resulting in a large pressure loss and a smaller charge dissipation range. To ensure the stability of the air flow, the expansion angle α must be less than the contraction angle β. In this technical solution, the expansion angle α is preferably 40°.

[0069] The usual environmental usage conditions of the ion rod are under standard atmospheric pressure (about 0.1 MPa), from 5°C to 35°C; the supply pressure of compressed air in general factories is usually between 0.1 MPa and 0.6 MPa.

[0070] Under these usage conditions, according to the compressible fluid dynamics formula, the relationship between the diameter of the air outlet on the end face of the electrode seat and the throat diameter can be obtained as:

[0071]

[0072] In formula 1: D 出气口 is the diameter of the air outlet on the end face of the electrode seat, D 出气口端面电极径向截面 is the radial cross-sectional diameter of the discharge electrode on the plane where the end face of the air outlet of the electrode seat is located, D 候口 is the throat diameter, D 喉口端面电极径向截面 is the radial cross-sectional diameter of the discharge electrode on the plane where the throat end face of the electrode seat is located, Ma 出气口 is the Mach number of the air flow at the air outlet.

[0073] Since the ion rod is used under standard atmospheric pressure, the static pressure at the air outlet is the standard atmospheric pressure of 0.1 MPa. Then, according to the compressible fluid dynamics formula, the relationship between the Mach number of the air flow at the air outlet and the air flow pressure at the inlet is:

[0074]

[0075] In formula 2: P 入 is the air flow pressure at the inlet of the contraction section of the air duct of the electrode seat. According to the usage conditions of the ion rod, it is between 0.1 and 0.6 MPa. It can be seen from this that the ideal gas flow velocity at the air outlet of the electrode seat is between 0 Mach and 1.83 Mach, that is, the air flow pressure input by the ion rod must be greater than 0.1 MPa to be used normally.

[0076] Substituting formula 2 into formula 1, we get:

[0077]

[0078] It can be seen from this that the design of the air duct structure needs to consider the factor of air flow pressure.

[0079] Substituting 1.83 (the ideal gas flow rate) into Equation 1, or substituting 0.6 MPa (the air flow pressure at the inlet of the air duct contraction section of the electrode base) into Equation 3, we can obtain:

[0080]

[0081] To ensure uniform and stable gas output from each gas outlet of the ion rod, the area of the gas outlet of the electrode base should conform to the following formula:

[0082] (S 出 -S 出气口端面电极径向截面 )×n < S 进 That is, Equation 5 is:

[0083]

[0084] In Equations 5 and 6, S 出 is the end face area of the gas outlet of the electrode base, S 出气口端面电极径向截面 is the radial cross-sectional area of the discharge electrode in the plane where the end face of the gas outlet is located, n is the number of gas outlets, and S 进 is the area of the gas inlet of the ion rod gas cavity.

[0085] Thus, the diameters of the gas outlet and the throat of the electrode base can be designed through Equations 4 and 6.

[0086] In the technical solution of the present invention, the specific combined structure of the discharge electrode 1, the electrode sleeve 2, and the electrode base 3 is shown in Figure 8 . The four protruding arms 2-2 of the electrode sleeve are inserted into the internal thread mounting posts 3-6 of the electrode base.

[0087] Specifically, in the technical solution of the present invention, the end face of the gas outlet of the electrode base, the top face of the thread mounting post, and the lower end face of the protruding cylinder of the electrode sleeve are parallel to each other, so that the discharge electrode is located at the center of the air duct. The compressed air flow enters the air duct of the electrode base through the four air inlet gaps 2-1 of the electrode sleeve.

[0088] Example:

[0089] The discharge electrode assembly manufactured by adopting the technical solution of the present invention (shown in Figure 8 ) is compared with the existing discharge electrode assembly (shown in Figure 9, Figure 10 ), and the comparison test data obtained are shown in Table 1:

[0090] Table 1. Comparison test data:

[0091]

[0092] It can be seen from the above comparison data that:

[0093] 1. Under the same test conditions, the pressure drop of the ion bar adopting the technical solution of the present invention is significantly smaller than that of the comparative product. It can be seen that after adopting the technical solution of the present invention, the pressure loss of the ion bar is smaller.

[0094] 2. Under the same test conditions, the charge dissipation speed of the sample bar of the present technical solution is significantly faster than that of the comparative product.

[0095] 3. Under the same test conditions, the balance voltage consistency and stability of the sample bar of the present technical solution are better than those of the comparative product.

[0096] For the technical solution of the present invention, the air passage of the electrode seat is successively composed of an air inlet section, a mixing section, a contraction section, a throat, and an expansion section; by optimizing the air inlet structure, the air passage structure, and the air outlet structure to improve the output state of the ionized air flow, the air output volume of the ion bar is uniform along its length direction, the air flow movement states in the horizontal directions on both sides are consistent at the same vertical test distance, and the air flow consumption can be reduced under the same air source pressure, the air flow speed can be increased, and a more balanced static electricity elimination effect can be obtained.

[0097] The present invention can be widely used in the design and manufacturing fields of air source type ion bars.

Claims

1. A method for making the static elimination performance of both horizontal air outlet positions of an ion bar consistent at the same vertical distance, including arranging several discharge electrode assemblies on the ion bar along the length direction of the ion bar; the discharge electrode assemblies include discharge electrodes, electrode sleeves and electrode seats; the discharge electrodes are sleeved with the electrode sleeves, and the first end of the electrode sleeve is connected to the electrode seat; the characteristics are: An air duct is arranged in the electrode seat along the longitudinal central axis; The air duct includes an air inlet section, a mixing section, a contraction section, a throat and a diffusion section connected in sequence; The end of the diffusion section forms the air duct outlet of the electrode seat; The air duct outlet is a flared opening structure; Among them, the parameters of the air duct structure are determined according to the following two formulas: Among them, D 出气口 is the diameter of the air outlet on the end face of the electrode seat, D 出气口端面电极径向截面 is the radial cross-sectional diameter of the discharge electrode on the plane where the end face of the air outlet of the electrode seat is located, D 候口 is the diameter of the throat, D 喉口端面电极径向截面 is the radial cross-sectional diameter of the discharge electrode on the plane where the end face of the throat of the electrode seat is located, P 入 is the air flow pressure at the inlet of the air duct contraction section of the electrode seat; n is the number of air outlets, S 进 is the area of the air inlet of the ion rod air cavity; The air duct of the electrode seat adopts an air flow acceleration structure mode of first contraction and then expansion, reducing the air duct volume and playing a role in accelerating the air flow velocity at the air duct outlet; and due to the increase in the air duct outlet jet angle, a wider static elimination range can be obtained; By changing and optimizing the air inlet structure, air duct structure and air outlet structure of the electrode seat air duct, the output state of the ionized air flow of each discharge electrode assembly is improved, so that the output air volume of each discharge electrode assembly along the length direction of the ion bar is uniform, and at the same vertical test distance, the air flow movement states of each discharge electrode assembly in the horizontal direction on both sides of the ion bar are consistent; and it can reduce the air flow consumption under the same air source pressure, increase the air flow velocity, achieve a more balanced and faster static elimination effect and obtain a larger static elimination range with a larger angle.

2. The method for making the static elimination performance of the ion rods consistent in the horizontal air outlet directions on both sides at the same vertical distance according to claim 1, characterized in that In the air duct, the diffusion angle α of the diffusion section is smaller than the contraction angle β of the contraction section.

3. The method for making the static elimination performance of the ion rods consistent in the horizontal air outlet directions on both sides at the same vertical distance according to claim 1, characterized in that The curvature radii of the contraction section, diffusion section and throat of the air duct are the same.

4. The method for making the static elimination performance of the ion rods consistent in the horizontal air outlet directions on both sides at the same vertical distance according to claim 1, characterized in that The overall structure of the discharge electrode is needle-shaped, cylindrical rod-shaped or cylindrical tube-shaped; the discharge electrode is inserted into the electrode sleeve for setting.

5. The method for making the static elimination performance of the ion rods consistent in the horizontal air outlet directions on both sides at the same vertical distance according to claim 1 or 4, characterized in that There is an interference fit between the discharge electrode and the electrode sleeve.

6. The method for making the static elimination performance of the ion rods on both sides at the same horizontal air outlet orientation consistent at the same vertical distance according to claim 1, characterized in that The overall structure of the electrode sleeve is a cylindrical structure; the first end of the electrode sleeve is inserted into the electrode seat for setting.

7. The method for making the ion rods have consistent charge elimination performance in the horizontal air outlet directions on both sides at the same vertical distance according to claim 1 or 6, characterized in that Four electrode sleeve protruding arms are arranged at equal angular intervals at the first end part of the electrode sleeve inserted into the electrode seat; An adjacent gap is arranged between two adjacent electrode sleeve protruding arms; The middle part of the electrode sleeve bulges into a frustum of a cylinder shape, and four electrode sleeve air inlet gaps are arranged at equal angular intervals at the bottom of the protruding frustum of the cylinder; The four electrode sleeve air inlet gaps communicate with the adjacent gaps between the four electrode sleeve protruding arms respectively; Compressed air flows into the air duct in the electrode seat through the air inlet gap and the adjacent gap.

8. The method for making the ion rods have consistent charge dissipation performance in the horizontal air outlet directions on both sides at the same vertical distance according to claim 1, characterized in that The electrode seat includes an air duct arranged along the longitudinal central axis; Four electrode seat peripheral ribs are arranged at equal angular intervals around the flared opening and the opening at the front of the electrode seat; An external thread mounting post is arranged at the rear of the electrode seat; The end face of the air duct outlet of the electrode seat, the top face of the external thread mounting post and the end face at the lower part of the protruding cylindrical platform of the electrode sleeve are parallel to each other; The discharge electrode is located at the central position of the air duct.

9. The method for making the ion rods have the same charge dissipation performance in the horizontal air outlet directions on both sides at the same vertical distance according to claim 1, characterized in that The cross-section of the air duct along the transverse axis is circular.

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