An electrical structure for static elimination

Abstract

An electric structure for static electricity elimination belongs to the field of static electricity elimination. The electric structure comprises a gas channel structure arranged in an ion wind stick core, the gas channel structure comprises two first and second cylindrical gas inlet channels arranged in mirror image with each other; a gas channel mixing structure cavity is arranged at a symmetry center line of the ion wind stick core; gas flow output ends of the two cylindrical gas inlet channels are respectively communicated with a gas channel mixing structure cavity of the ion wind stick; two gas flows input from the first and second cylindrical gas inlet channels into the ion wind stick core meet and mix in the gas channel mixing structure cavity to form a mixed gas flow; the mixed gas flow is output through a gas outlet slit located at one side of the gas channel mixing structure cavity, and a sweeping ion gas flow output at a set sweeping angle is formed by using turbulent instability; and a farther static electricity elimination distance and a wider static electricity elimination range are achieved. The electric structure is suitable for the design and manufacturing field of ion wind sticks.

Description

Technical Field

[0001] This utility model belongs to the field of static electricity elimination, and in particular relates to an electrical structure for static electricity elimination. Background Technology

[0002] An ion bar (also known as an ion bar) is a static eliminator that uses compressed airflow to eliminate static electricity over a long distance. The shape of the output airflow directly affects the static elimination effect, such as the static elimination distance and the static elimination range.

[0003] With the upgrading of industry development, higher performance requirements have been put forward for ion air bars (longer static elimination distance and wider static elimination range). However, the existing air channel structure and discharge structure of ion air bars cannot effectively meet market demand. There is an urgent need to develop an ion air bar that is suitable for a wider static elimination range.

[0004] The electrical structure of existing ionizer bars can be referenced from the applicant's previously filed utility model patent "A Medium-Barrier Type Anti-Electric Shock AC Ionizer Bar" (authorization announcement date: December 10, 2019, authorization announcement number: CN209767894U) and appearance patent "Ionizer Bar Core with Gas Source for Static Elimination" (authorization announcement date: December 7, 2016, authorization announcement number: CN303959153S). Its gas channels (referred to as gas channel 9 in CN209767894U, see attached figure 3 in its specification) are symmetrically arranged on both sides of the bar's cross-section. The electrode needles (referred to as "high-voltage discharge electrode" 1 in CN209767894U, see attached figure 3 in its specification) are... Figure 2 As shown in Figure 3, the electrodes are arranged longitudinally (along the length of the rod) at the center of the rod. Furthermore, referring to the front view in CN303959153S, it can be seen that ion airflow-assisted transport is achieved by drilling holes (cylindrical holes) on the outside of the airway (with the electrode needle tip facing one side).

[0005] For the electrical structure of another existing ion wind bar, please refer to the invention patent "Multi-segment linear ionization rod and ionization unit" with the authorization announcement date of November 2, 2016 and authorization announcement number CN104247180B. It adopts a "line-plate" discharge structure (see figure 3D in its specification) and compressed air outlet holes with the electrodes along the line arranged in an alternating manner (see figure 3E in its specification).

[0006] In practical use, the existing technical solutions have been found to have the following technical defects:

[0007] 1) The output airflow failed to effectively cover / enclose the electrode needle or discharge electrode, resulting in low ion transport efficiency, short static elimination distance, and slow static elimination time.

[0008] 2) The output airflow pattern is a straight jet centered on a cylindrical hole, which has a very limited diffusion range, resulting in a limited ion transport range and ultimately a small electrostatic elimination range.

[0009] 3) The existing ion rods use a "wire-plate" discharge structure, which is relatively complex in design, making the manufacturing process difficult and costly.

[0010] Improving the airflow and discharge structures of ion bars to expand their ion transport range, thereby increasing their static elimination range and ion transport efficiency, enabling ions to be transported to farther distances more quickly and increasing the static elimination distance, is a practical technical problem that urgently needs to be solved in the product design and manufacturing of ion bars. Utility Model Content

[0011] The purpose of this invention is to provide an electrical structure for static electricity elimination. The air duct structure of this electrical structure includes two cylindrical air inlet channels arranged mirror images of each other. These two cylindrical air inlet channels are connected to the air mixing structure cavity of the ion air bar. Within the air mixing structure cavity of the ion air bar, or at the outlet slit, turbulent airflow is generated. Utilizing the instability of turbulence, a sweeping (also known as a swingable curtain or screen-like) ion airflow is formed, creating a sweeping airflow pattern for the output airflow, thereby achieving a longer static electricity elimination distance and a wider static electricity elimination range.

[0012] The technical solution of this utility model is: to provide an electrical structure for static electricity elimination, including a horizontally arranged ion air bar core, in which an air passage structure is provided; its characteristic is:

[0013] The air intake structure includes two first cylindrical air intake channels and a second cylindrical air intake channel that are mirror images of each other;

[0014] At the symmetrical center line of the ion wind rod core, a gas mixing structure cavity is set;

[0015] The airflow output ends of the two cylindrical air inlet channels are respectively connected to the airflow path of the air mixing structure cavity of the ion fan bar.

[0016] Specifically, the two cylindrical air intake channels pass through a vertical air intake chamber and a horizontal air intake chamber, respectively, and are connected to the corresponding air passage of the air mixing structure chamber of the ion fan bar.

[0017] Furthermore, the air source input ends of the first cylindrical air intake channel and the second cylindrical air intake channel are connected to an external compressed air source or an external compressed air pipe.

[0018] The first cylindrical air intake channel and the second cylindrical air intake channel are respectively provided with a plate-shaped vertical air intake cavity and a plate-shaped horizontal air intake cavity at their air source output ends. The air passages of the two plate-shaped horizontal air intake cavities are connected to the air passage mixing structure cavity located at the center line of the rod core symmetry.

[0019] Specifically, a cylindrical metal wire electrode is set at the very center of the air outlet slit; on both sides of the metal wire electrode, two cylindrical metal grounding electrodes that are mirror images of each other are set.

[0020] Furthermore, the diameter of the cylindrical metal grounding electrode is larger than the diameter of the cylindrical metal wire electrode; the two cylindrical metal grounding electrodes are positioned on the surface of the ion wind rod core on the gas outlet side.

[0021] Specifically, the upper half of the cross-section of the airway mixing structure cavity is a semi-circular structure, and the lower half is a square structure with rounded corners.

[0022] The characteristic dimension D of the airway mixing structure cavity, that is, the transverse diameter of the semi-circular structure of the airway mixing structure cavity, is less than or equal to 5 mm.

[0023] At the center of the bottom of the airway mixing structure cavity, there is an air outlet slit;

[0024] The vent slit is positioned along the length of the rod core.

[0025] Furthermore, the two plate-shaped horizontal air intake chambers are positioned below the upper semi-circular tunnel of the airway mixing structure cavity, and the upper boundary of the two plate-shaped horizontal air intake chambers is at the same horizontal level as the horizontal diameter line of the upper semi-circular tunnel of the airway mixing structure cavity.

[0026] The thickness H of each of the said plate-shaped horizontal air intake chambers is less than or equal to 0.25 mm;

[0027] The two plate-shaped horizontal air intake chambers are located on the same horizontal plane; or, they are located on different horizontal planes.

[0028] Relative to the longitudinal centerline or longitudinal center plane of the airway mixing structure cavity, the two plate-shaped horizontal air intake cavities have the same symmetrical included angle;

[0029] Alternatively, the two plate-shaped horizontal air intake chambers have different included angles relative to the longitudinal centerline or longitudinal center plane of the airway mixing structure cavity.

[0030] Specifically, the sweeping frequency of the sweeping airflow generated by the electrical structure satisfies the following condition:

[0031]

[0032] Specifically, the two airflows input into the ion wind rod core from the first and second cylindrical air inlet channels meet and mix in the airway mixing structure cavity to form a mixed airflow; the mixed airflow is output through the air outlet slit located on one side of the airway mixing structure cavity to form a sweeping ion airflow output at a set sweeping angle.

[0033] Alternatively, the two airflows input into the ion air rod core from the first and second cylindrical air inlet channels meet and mix in the airway mixing structure cavity to form a mixed airflow; the mixed airflow is output through the air outlet slit located on one side of the airway mixing structure cavity to form a swingable curtain-like or curtain-like ion airflow.

[0034] Compared with the prior art, the advantages of this utility model are:

[0035] 1. The technical solution of this utility model, by setting a second air inlet chamber and adopting a dual-inlet airway mixing structure, generates turbulent airflow within the airway mixing structure chamber of the ion wind bar, or at the air outlet slit; a sweeping airflow pattern is formed at the air outlet slit (or, a swingable curtain-like or screen-like ion airflow is ejected), which expands the ion delivery range and thus expands the electrocution range;

[0036] 2. By adopting the technical solution of this utility model, the wire electrode is completely covered or wrapped in the compressed airflow, which increases the ion transport efficiency, enables the ions to be transported to a greater distance more quickly, and increases the electrostatic elimination distance.

[0037] 3. The technical solution of this utility model adopts a "line-to-line" discharge structure, which simplifies the discharge structure design, thereby simplifying the manufacturing process and reducing manufacturing costs;

[0038] 4. The technical solution of this utility model, by using a wire electrode, makes the discharge morphology extend in a filament-like manner, which is different from the point-like shape of the electrode needle. That is, the discharge range is expanded, its environmental tolerance is enhanced, and the phenomenon of corona blockage caused by dust contamination when using electrode needles in existing ion wind bars is greatly alleviated. Attached Figure Description

[0039] Figure 1-1 A schematic cross-sectional view of the electrical structure of the ion air bar located at the same horizontal position as the second air inlet chamber of this utility model;

[0040] Figure 1-2 A schematic cross-sectional view of the electrical structure of the ion wind bar set at different horizontal positions in the second air inlet chamber of this utility model;

[0041] Figure 1-3 A schematic cross-sectional view of the electrical structure of the ion air bar set at a 204° included angle in the second air inlet chamber of this utility model;

[0042] Figure 1-4 A schematic cross-sectional view of the electrical structure of the ion air bar set at a 90° angle to the second air inlet chamber of this utility model;

[0043] Figure 2 This is a flowchart of the simulation testing and verification process for this utility model;

[0044] Figure 3-1 A schematic diagram of the simulated air passage structure set at the same horizontal position as the second air inlet chamber of this utility model;

[0045] Figure 3-2 A schematic diagram of the simulated air passage structure set at different horizontal positions of the second air inlet chamber of this utility model;

[0046] Figure 3-3 A schematic diagram of the simulated air passage structure for the second air inlet chamber of this utility model with a 204° included angle;

[0047] Figure 3-4 A schematic diagram of the simulated air passage structure for the second air inlet chamber of this utility model, set at a 90° angle.

[0048] Figure 4-1-a A schematic diagram of the flow field of the air passage structure set at the same horizontal position as the second air inlet chamber of this utility model at t = 290.1 ​​ms;

[0049] Figure 4-1-b A schematic diagram of the flow field of the air passage structure set at the same horizontal position as the second air inlet chamber of this utility model at t = 293.4 ms;

[0050] Figure 4-1-c A schematic diagram of the flow field of the air passage structure set at the same horizontal position as the second air inlet chamber of this utility model at t = 296.3 ms;

[0051] Figure 4-1-d A graph showing the flow velocity data at different points at the outlet of the air passage structure set at the same horizontal position in the second air inlet chamber of this utility model.

[0052] Figure 4-2-a A schematic diagram of the flow field at t = 292.2 ms for the air passage structure set at different horizontal positions of the second air inlet chamber of this utility model;

[0053] Figure 4-2-b A schematic diagram of the flow field at t=295ms for the air passage structure set at different horizontal positions of the second air inlet chamber of this utility model.

[0054] Figure 4-2-c A schematic diagram of the flow field at t = 297.8 ms for the air passage structure set at different horizontal positions of the second air inlet chamber of this utility model;

[0055] Figure 4-2-dA graph showing the flow velocity data at different points at the outlet of the air passage structure set at different horizontal positions in the second air inlet chamber of this utility model.

[0056] Figure 4-3-a A schematic diagram of the flow field of the air passage structure set at a 204° angle for the second air inlet chamber of this utility model at t = 265.5 ms;

[0057] Figure 4-3-b A schematic diagram of the flow field of the air passage structure set at a 204° included angle for the second air inlet chamber of this utility model at t=267ms;

[0058] Figure 4-3-c A schematic diagram of the flow field of the air passage structure set at a 204° included angle for the second air inlet chamber of this utility model at t=274ms;

[0059] Figure 4-3-d A graph showing the flow velocity data at different points at the outlet of the air passage structure set at a 204° included angle for the second air inlet chamber of this utility model.

[0060] Figure 4-4-a A schematic diagram of the flow field of the air passage structure set at a 90° angle for the second air inlet chamber of this utility model at t = 287.2 ms;

[0061] Figure 4-4-b A schematic diagram of the flow field of the air passage structure set at a 90° angle for the second air inlet chamber of this utility model at t = 289.3 ms;

[0062] Figure 4-4-c A schematic diagram of the flow field of the air passage structure set at a 90° angle for the second air inlet chamber of this utility model at t = 294 ms;

[0063] Figure 4-4-d A graph showing the flow velocity data at different points at the outlet of the air passage structure set at a 90° angle to the second air inlet chamber of this utility model.

[0064] Figure 5-1 A comparative data diagram showing the flow velocity at the outlet center point of the air passage structure with different second air inlet chambers in this utility model;

[0065] Figure 5-2 A comparative data chart of flow velocities at the outlet (x = -1, y = 0) of different second air inlet chambers in this utility model;

[0066] Figure 5-3 A comparative data chart of flow velocities at the outlet (x=+1, y=0) of different second air inlet chambers in this utility model;

[0067] Figure 6 This is a simulation diagram of the current-current field structure of this utility model;

[0068] Figure 7-aA schematic diagram of the airflow distribution at t=8.2ms for the electro-hydraulic field set at the same horizontal position as the second air inlet chamber of this utility model;

[0069] Figure 7-b A schematic diagram of the airflow distribution at t=292.2ms for the electro-hydraulic field set at the same horizontal position as the second air inlet chamber of this utility model;

[0070] Figure 7-c A schematic diagram of the airflow distribution at t=295.3ms for the electro-hydraulic field set at the same horizontal position as the second air inlet chamber of this utility model;

[0071] Figure 7-d A schematic diagram of the airflow distribution at t=298.3ms for the electro-hydraulic field set at the same horizontal position as the second air inlet chamber of this utility model;

[0072] Figure 8 The positive ion number density distribution diagram of the electro-fluid field set at the same horizontal position in the second air inlet chamber of this utility model at different times.

[0073] Figure 9 A diagram showing the positive ion number density distribution at the outlet boundary of the electro-fluid field, which is located at the same horizontal position as the second air inlet chamber of this invention.

[0074] Wherein: 1 is the core of the ion air bar, 2 is the mounting slot of the ion air bar, 3 is the air passage structure of the ion air bar, 3-1 is the first cylindrical air inlet channel, 3-1' is the second cylindrical air inlet channel, 3-2 is the first vertical air inlet chamber, 3-2' is the second vertical air inlet chamber, 3-3 is the first horizontal air inlet chamber, 3-3' is the second horizontal air inlet chamber, 3-3'-a is the horizontal air inlet chamber, 3-3-1 and 3-3'-b are 204° angled air inlets, 3-3-2 and 3-3'-c are 90° angled air inlets, 3-4 is the air passage mixing structure chamber, 3-5 is the contraction section, 3-6 is the air outlet slit, 3-7 is the expansion section, 4 is the metal wire electrode, and 5 is the cylindrical metal grounding electrode;

[0075] a is the airflow inlet boundary, b is the airflow outlet boundary, b' is the current field outlet boundary, c is the outer circle of the metal wire electrode, and d is the exposed part of the cylindrical metal grounding electrode. Detailed Implementation

[0076] To make the above-mentioned objectives and beneficial effects of this utility model more apparent and understandable, the specific implementation methods of this technical solution will be further described below with reference to the accompanying drawings and embodiments:

[0077] See appendix Figures 1-1 to 1-4As shown in the figure, the technical solution of this utility model includes a horizontally arranged ion air bar core 1, an ion air bar mounting slot 2 is provided on one side of the ion air bar core (taking the top of the ion air bar core as an example in the figure), and an air passage structure 3 is provided in the ion air bar core for the inflow of external compressed air to provide an auxiliary air source for the ion air bar.

[0078] At the gas outlet of one end of the airway structure 3 (taking the lower end of the airway structure as an example in the figure, or the lower part of the airway structure), an outlet slit 3-6 is provided; at the outlet slit, a cylindrical metal wire electrode 4 is provided, and on both sides of the metal wire electrode 4, two cylindrical metal grounding electrodes 5 that are mirror images of each other are provided.

[0079] From the overall structure of the ion air bar core, the ion air bar mounting slot 2, the air passage structure 3, the air outlet slits 3-6, the cylindrical metal wire electrode 4, and the cylindrical metal grounding electrode 5 are all arranged along the length of the ion air bar core; among them, the air passage structure 3 is arranged through the core.

[0080] From the cross-section of the ion bar core (i.e., a vertical cross-section along the width of the ion bar core in the length direction of the horizontally placed ion bar core), the air passage structure 3 includes two cylindrical air inlet channels (also referred to as the first cylindrical air inlet channel 3-1 and the second cylindrical air inlet channel 3-1') arranged in a mirror image of each other. The output ends of the two cylindrical air inlet channels located on one side of the two cylindrical air inlet channels (directly below each cylindrical air inlet channel in the figure) are connected (or communicated) to the air passage mixing structure cavity of the ion bar.

[0081] Specifically, the two cylindrical air intake channels mentioned above are respectively provided with a pair of plate-shaped vertical air intake chambers 3-2 and 3-2' (also referred to as the first plate-shaped vertical air intake chamber 3-2 and the second plate-shaped vertical air intake chamber 3-2') and a pair of plate-shaped horizontal air intake chambers 3-3 and 3-3' (also referred to as the first horizontal air intake chamber 3-3 and the second horizontal air intake chamber 3-3'). The two plate-shaped horizontal air intake chambers are finally connected to the airway mixing structure cavity 3-4 located at the center line of the rod core symmetry.

[0082] The electrical structure for static electricity elimination described above will be further described below with reference to the accompanying drawings:

[0083] A. See Figure 1-1 As shown, an air passage structure 3 is provided inside the core 1 of an ion air bar. This air passage structure penetrates the core and includes two cylindrical air inlet channels 3-1 and 3-1' (also referred to as the first cylindrical air inlet channel 3-1 and the second cylindrical air inlet channel 3-1') that are mirror images of each other, for the inflow of external compressed air to provide an air source for the ion air bar.

[0084] B. On one side of the two cylindrical air intake channels (located directly below each cylindrical air intake channel in the figure), a pair of plate-shaped vertical air intake chambers 3-2 and 3-2' (also referred to as the first vertical air intake chamber 3-2 and the second vertical air intake chamber 3-2') and a pair of plate-shaped horizontal air intake chambers 3-3 and 3-3' (also referred to as the first horizontal air intake chamber 3-3 and the second horizontal air intake chamber 3-3') are respectively arranged. The final air passage of the two plate-shaped horizontal air intake chambers is connected to the airway mixing structure cavity 3-4 located at the center line of the rod core symmetry; (that is, the output ends of the first cylindrical air intake channel 3-1 and the second cylindrical air intake channel 3-1' are connected to the air passage of the airway mixing structure cavity 3-4 through the corresponding plate-shaped vertical air intake chamber and plate-shaped horizontal air intake chamber respectively).

[0085] By adopting the above-mentioned structural configuration, two airflows are input into the core of the ion air bar from the first and second cylindrical air inlet channels 3-1 and 3-1'. They meet and mix in the air mixing structure cavity 3-4 to form a mixed airflow. The mixed airflow is output through the outlet slit. As the mixed airflow (called the sweeping airflow) is output, it carries out the positive and / or negative ions generated on the cylindrical metal wire electrode 4 located at the outlet slit, which act on the product or component to be statically removed, thereby realizing the static elimination (neutralization) function.

[0086] C. The airway mixing structure cavity 3-4 causes the airflow entering from the plate-shaped horizontal air intake cavities 3-3 and 3-3' to oscillate. Its structure can be divided into two parts: the upper half is semi-circular and the lower half is a square with rounded corners. At the center of the bottom of the airway mixing structure cavity, an exhaust slit 3-6 is set that first contracts (section 3-5 in the figure) and then expands (section 3-7 in the figure) through the core. The contraction angle and expansion angle of the exhaust slit are the same (i.e., the two angles of contraction and expansion are equal), and the extension lines of the contraction section 3-5 and the expansion section 3-6 form a vertical angle.

[0087] The purpose of this structural arrangement is to enable the sweeping airflow flowing out from the outlet slits 3-6 to sweep at the set sweeping angle to the maximum extent, or to spray out a swingable curtain or curtain-like ion airflow; the contraction section 3-5 can also make the formed sweeping airflow more symmetrical and stable within the sweeping angle.

[0088] D. At the center of the vent slit 3-6, a cylindrical metal wire electrode 4 is set, and two cylindrical metal grounding electrodes 5 that are mirror images of each other are set on both sides of the metal wire electrode 4.

[0089] The diameter of the cylindrical metal grounding electrode 5 is larger than the diameter of the cylindrical metal wire electrode 4; the two cylindrical metal grounding electrodes 5 are positioned on the surface of the ion wind rod core 1 on the gas outlet side.

[0090] E. Preferably, to achieve a larger outgoing airflow sweep angle and accelerate the formation of the sweep airflow, the two plate-shaped horizontal air inlets 3-3 and 3-3' should be located below the upper semi-circular tunnel of the airway mixing structure cavity 3, and the upper boundaries of the two plate-shaped horizontal air inlets should be aligned with the horizontal diameter line of the upper semi-circular tunnel of the airway mixing structure cavity 3. Figure 1-1 The magenta dashed line (or magenta dashed line) in the middle is the same horizontal line.

[0091] F. Preferably, to make it easier for the two airflows entering the airway mixing structure cavity 3-4 to oscillate, and thus easier to form a sweeping airflow, the thickness H of the two plate-shaped horizontal air inlet cavities can be increased (see...). Figure 1-1 (As shown in the figure) is set to less than or equal to 0.25 mm.

[0092] G. Optional, see below Figure 1-2 To accelerate the formation of a sweeping airflow, the two horizontal air intake chambers 3-3 and 3-3'-a can be set on different horizontal planes.

[0093] H. Optionally, see Figure 1-3 By setting the two horizontal air intake chambers 3-3-1 and 3-3'-b at a 204° angle (i.e., the air intake angle α equals 204°), a sweeping airflow can also be formed.

[0094] I. Optionally, see Figure 1-4 Setting the intake chambers 3-3-2 and 3-3'-c at a 90° angle (i.e., the intake angle α equals 90°) can also create a sweeping airflow, but the sweeping effect is not as good as the other three settings.

[0095] J. To achieve a better ion balance effect of the ion gas flow within the sweeping range, the sweeping frequency of the sweeping gas flow generated by the electrical structure of this technical solution must meet the following conditions:

[0096]

[0097] Among them, the sweep frequency f s The size of the airway mixing structure cavity and the air intake angle of the plate-shaped air intake cavities 3-3 and 3-3' are strongly correlated: the larger the characteristic size D of the airway mixing structure cavity 3-4, the higher the sweep frequency f. s The lower the value, the longer the power dissipation time and the greater the fluctuation; the larger the air intake angle α of the plate-shaped air intake chambers 3-3 and 3-3', the greater the sweeping frequency f. s The lower the value, the larger the sweep angle, which increases the range of electrical discharge.

[0098] Therefore, the technical solution of this utility model, after simulation experiments and comprehensive evaluation combined with product application experience, is designed to adapt to / match the high-voltage operating frequency f of the ion wind bar wire electrode. l-HVThe sweeping airflow range and the required static elimination time t determine the characteristic dimension D of the airway mixing structure cavity (see...). Figure 1-1 As shown, the diameter of the semi-circular tunnel in the cross-section of the airway mixing structure cavity is set to be less than or equal to 5 mm, and a plate-shaped horizontal air intake cavity is adopted (i.e., the air intake angle α is equal to 180°).

[0099] K. As a special case, an air supply mode in which the ventilation pressures of the first cylindrical air intake channel 3-1 and the second cylindrical air intake channel 3-1' are not equal can also be adopted (for example, a pressure reducing valve is set at the inlet of one of the cylindrical air intake channels so that the air supply pressures of the two cylindrical air intake channels are not equal) in order to obtain more and more satisfactory mixed sweeping airflow effects.

[0100] L. As another special case, the output ends of the two horizontal air intake chambers 3-3 and 3-3'-a of the first cylindrical air intake channel 3-1 and the second cylindrical air intake channel 3-1' can also be set at different angles (for example, the first horizontal air intake chamber 3-3 and the second horizontal air intake chamber 3-3' can be set at different (unequal) angles) in order to achieve a more complex mixed sweeping airflow effect.

[0101] Example:

[0102] To verify the feasibility of the electrical structure of the ion wind bar in this technical solution, a step-by-step simulation test was conducted first on the single airflow field formed by the internal air channel structure of the ion wind bar core, and then a simulation verification test was conducted on the current field when a "line-to-line" discharge structure exists. For detailed testing and verification procedures, please refer to [link to relevant documentation]. Figure 2 As shown:

[0103] 1) Perform flow simulation tests on airway structures with different structural parameters;

[0104] 2) Based on product application experience, considering the high-voltage operating frequency of the ion wind bar electrode, the airflow sweeping range (sweeping angle), the power elimination time, and the ion balance requirements, a comprehensive evaluation of the gas channel structure with different structural parameters is conducted to determine the final gas channel structure parameters.

[0105] 3) Based on the final determined airway structure, consider the "line-to-line" discharge structure, and reconstruct the complete current fluid field simulation structure to conduct simulation verification experiments;

[0106] 4) For the simulation structure of the electrofluid field, the Realizable k-ε turbulence mathematical model is first applied to obtain the flow field distribution data at different times; based on the obtained flow field distribution data at different times, the charged particle transport mathematical model is then applied to finally obtain the charged particle distribution data at the corresponding time.

[0107] 5) Compare and analyze the flow field distribution at different times and the corresponding charged particle distribution at those times to verify the feasibility of the technical solution.

[0108] The simulation testing and verification methods of this technical solution will be described in detail below with reference to the accompanying drawings:

[0109] 1. See Figure 3-1 , for the basis Figure 1-1 The simplified technical solution of this invention features a simulated air duct structure with two plate-shaped horizontal air intake chambers (hereinafter referred to as air intake chambers) located at the same horizontal position. The airflow is described using a Realizable k-ε turbulence model.

[0110] —Momentum continuity equation

[0111] —Mass continuity equation

[0112] ——Viscous force tensor

[0113] — Turbulent kinetic energy equation

[0114] — Turbulent kinetic energy generation term

[0115] ——Turbulent viscosity

[0116]

[0117] — Turbulent dissipation equation

[0118]

[0119]

[0120] Among them, S ij Ω is the average strain tensor. ij C is the rotational rate tensor; ε2 =1.9, A0=4, σ k =1,σ ε =1.2 are all model coefficients; ρ is the fluid density (kg / m³). 3 ), where is the air density under standard conditions; u is the fluid velocity (m / s).

[0121] Figure 3-1 In the diagram, the inlet boundary a is set to a gas flow rate of 150 L / min, representing a fully developed flow; the outlet boundary b is under zero pressure conditions; and the other boundaries are non-slip wall boundaries.

[0122] 2. See Figure 4-1-a , 4-1-b As shown in Figures 4-1-c and 4-1-d, this technical solution presents a flow field simulation test for an airway structure with two plate-shaped horizontal air inlets located at the same horizontal position; its sweep frequency is 80Hz, and the time to form / establish a stable sweep is approximately 28ms.

[0123] 3. See Figure 3-2 , for the basis Figure 1-2 The simplified technical solution of this invention uses a simulated air passage structure with two plate-shaped horizontal air inlets at different horizontal positions. It also adopts the aforementioned Realizable k-ε turbulence model and inlet, outlet, and no-slip wall boundary conditions.

[0124] 4. See Figure 4-2-a , 4-2-b Figures 4-2-c and 4-2-d show the flow field simulation test of the air passage structure set at different horizontal positions of the two plate-shaped horizontal air inlet chambers in this technical solution; its sweep frequency is 78.125Hz, and the time to form / establish a stable sweep is about 25.7ms.

[0125] 5. See Figure 3-3 , for the basis Figure 1-3 The simplified technical solution of this invention features a simulated airway structure with two plate-shaped horizontal air inlets set at a 204° angle. It also adopts the aforementioned Realizable k-ε turbulence model and inlet, outlet, and no-slip wall boundary conditions.

[0126] 6. See also Figure 4-3-a , 4-3-b Figures 4-3-c and 4-3-d show the flow field simulation test of the air passage structure with two plate-shaped horizontal air inlets set at an angle of 204° in this technical solution; its sweeping frequency is about 57.8 Hz, and the time to form / establish a stable sweep is about 39.7 ms.

[0127] 7. See also Figure 3-4 , for the basis Figure 1-4 The simplified technical solution of this invention features a simulated airway structure with two plate-shaped horizontal air inlets set at a 90° angle. It also adopts the aforementioned Realizable k-ε turbulence model and inlet, outlet, and no-slip wall boundary conditions.

[0128] 8. See also Figure 4-4-a , 4-4-b Figures 4-4-c and 4-4-d show the flow field simulation test of the air passage structure with two plate-shaped horizontal air inlets set at a 90° angle in this technical solution; its sweeping frequency is about 73Hz, and the time to form / establish a stable sweep is about 61.75ms.

[0129] 9. Combining the above Figure 5-1 , 5-2 The analysis in section 5-3 also shows that an airway structure with two plate-shaped horizontal air inlets at different horizontal positions more easily and quickly forms a sweeping airflow, resulting in the highest sweeping airflow velocity and a higher sweeping frequency. The sweeping airflow characteristics formed by an airway structure with two plate-shaped horizontal air inlets at the same horizontal position are similar to those formed by two plate-shaped horizontal air inlets at different horizontal positions. When the two plate-shaped horizontal air inlets are set at a 204° angle, the time to form a stable sweeping airflow is significantly prolonged, the sweeping airflow frequency is significantly reduced, and the overall airflow velocity decreases slightly. However, when the two plate-shaped horizontal air inlets are set at a 90° angle, the time to form a stable sweeping airflow is the latest, the sweeping frequency is slightly lower, and the sweeping airflow velocity is the lowest (see...). Figure 5-2 , 5-3 The sweeping effect was not ideal.

[0130] 10. The important structural parameters of the airway structure in the above simulation test are as follows: the thickness H of each plate-shaped horizontal air intake cavity is set to 0.25 mm, and the characteristic dimension D of the airway mixing structure cavity is set to 5 mm.

[0131] 11. See also Figure 6 , for the basis Figure 1-1 The simplified technical solution of this invention features a current field simulation structure with two plate-shaped horizontal air inlets located at the same horizontal position. In order to verify the effect of the sweeping airflow on the charged particles generated by the discharge, a semi-circular air region with the width of the ion rod as its diameter is set, and the semi-circular line b' is the outlet boundary.

[0132] 12. For the above-mentioned electrofluid field simulation structure, the airflow field is still described using the Realizable k-ε turbulence model, and the inlet, outlet, and no-slip wall boundary conditions remain unchanged; while the charge transport process is described by the fully charged particle transport model:

[0133]

[0134] D=ε0ε r E

[0135]

[0136] w i =z i μ i E

[0137] i = e, p, n (e represents electron, p represents positive ion, n represents negative ion)

[0138] z e,p,n =-1,+1,-1

[0139]

[0140] R e =α|w e |n e -η|w e |n e -β ep n e n p

[0141] R p =α|w e |n e -β ep n e n p -β pn n p n n

[0142] R n =η|w e |n e -β pn n p n n

[0143] Where E is the electric field intensity vector, V / m; V is the electric potential, V; and D is the electric displacement vector, C / m. 3 ;ρ e Space charge density, C / m 3 e is the elementary charge, equal to 1.602E. -19 C;z i n is the charge number; i The number density of charged particles, 1 / m 3 ε0 is the vacuum permittivity, equal to 8.854187817E-12F / m; ε r w is the relative permittivity; i D is the electromigration velocity of charged particles, m / s; u is the fluid velocity, m / s; i Let m be the diffusion coefficient of charged particles. 2 / s;R i For the reaction rate of charged particles, 1 / (m 3 ·s); μ i m is the electric mobility of charged particles. 2 / (V·s); k B T is the Boltzmann constant, equal to 1.380649E-23 J / K; i η is the temperature of the charged particle, K; α is the ionization coefficient, 1 / m; η is the adhesion coefficient, 1 / m; β ep m is the electron-positron recombination coefficient. 3 / s;β pnThe positive ion-negative ion recombination coefficient, m 3 / s.

[0144] The transport parameters of the aforementioned charged air particles can be found in the literature, as shown in the table below:

[0145]

[0146] Figure 6 In the middle, the applied voltage V = +7kV is set on the outer circle c of the metal wire electrode, and the electron and negative ion conditions are set to zero diffusion flux:

[0147]

[0148] The exposed portion d of the two cylindrical metal grounding electrodes is set to ground at 0V, and the positive ion is set to a condition with no diffusion flux.

[0149]

[0150] Other boundaries are insulating boundaries, through which no electric field or charged particles pass, that is:

[0151] -n·D=0

[0152]

[0153] i = e, p, n

[0154] 13. See also Figure 7-a , 7-b Figures 7-c and 7-d show the simulation results of airflow distribution at different times for the current fluid field set at the same horizontal position in the two sheet-like horizontal air inlets of this technical solution; from Figure 7-b , 7-d A distinctly symmetrical sweeping airflow can be observed.

[0155] 14. See also Figure 8 The figure shows the distribution of positive ion concentration at different times in the electrofluid field of two plate-shaped horizontal air inlet chambers set at the same horizontal position in this technical solution; the directional influence of the sweeping airflow on the positive ion distribution can be seen from the figure.

[0156] 15. See also Figure 9 The figure shows the distribution of positive ion concentration / number density at the semi-circular outlet boundary at different times for the current fluid field of two plate-shaped horizontal air inlet chambers set at the same horizontal position in this technical solution.

[0157] The figure further shows that: when there is no airflow input (t = 0 ms), the positive ion concentration is the lowest at the semi-circular outlet boundary (blue solid line in the figure); at t = 8.2 ms, the airflow reaches its maximum velocity vertically downward, thus driving the positive ions downward (green dashed line in the figure); at t = 292.2 ms, the sweeping airflow causes the positive ions to shift to the left as a whole (red dagger line in the figure); at t = 295.3 ms, the sweeping airflow causes the positive ions to shift downward as a whole (cyan dotted line in the figure); at t = 298.3 ms, the sweeping airflow causes the positive ions to shift to the right as a whole (magenta solid line in the figure).

[0158] The technical solution of this utility model adopts a dual-inlet airway and a mixed-structure cavity airway structure, generating turbulent airflow within the airway mixed-structure cavity of the ion air bar (or at the outlet slit); forming a sweeping airflow pattern at the outlet slit, expanding the ion delivery range and thus increasing the electrostatic elimination range of the ion air bar; its line electrode is completely covered / encased in the compressed airflow, increasing the ion delivery efficiency, enabling ions to be delivered more quickly to a greater distance, and increasing the electrostatic elimination distance of the ion air bar; it adopts a "line-to-line" discharge structure, simplifying the discharge structure design of the ion air bar, thereby simplifying the manufacturing process of the ion air bar and reducing manufacturing costs.

[0159] This invention can be widely used in the design and manufacturing of ion air bars.

Claims

1. An electrical structure for static electricity elimination, comprising a horizontally arranged ionizer core, wherein an air passage structure is provided within the ionizer core; characterized in that: The air intake structure includes two first cylindrical air intake channels and a second cylindrical air intake channel that are mirror images of each other; At the symmetrical center line of the ion wind rod core, a gas mixing structure cavity is set; The airflow output ends of the first and second cylindrical air inlet channels are respectively connected to the airflow path of the air mixing structure cavity of the ion fan bar.

2. The electrical structure for static electricity elimination according to claim 1, characterized in that: The two cylindrical air intake channels are respectively connected to the air mixing structure cavity of the ion wind bar through a vertical air intake chamber and a horizontal air intake chamber.

3. The electrical structure for static electricity elimination according to claim 1, characterized in that: The air source input ends of the first cylindrical air intake channel and the second cylindrical air intake channel are connected to an external compressed air source or an external compressed air pipe. The first cylindrical air intake channel and the second cylindrical air intake channel are respectively provided with a plate-shaped vertical air intake cavity and a plate-shaped horizontal air intake cavity at their air source output ends. The air passages of the two plate-shaped horizontal air intake cavities are connected to the air passage mixing structure cavity located at the center line of the rod core symmetry.

4. The electrical structure for static electricity elimination according to claim 1, characterized in that... A cylindrical metal wire electrode is installed at the very center of the vent slit; On both sides of the metal wire electrode, two cylindrical metal grounding electrodes that are mirror images of each other are respectively set.

5. The electrical structure for static electricity elimination according to claim 4, characterized in that: The diameter of the cylindrical metal grounding electrode is larger than the diameter of the cylindrical metal wire electrode; the two cylindrical metal grounding electrodes are positioned on the surface of the ion wind rod core on the gas outlet side.

6. The electrical structure for static electricity elimination according to claim 3, characterized in that: The upper half of the cross-section of the airway mixing structure cavity is a semi-circular structure, and the lower half is a square structure with rounded corners. The characteristic dimension D of the airway mixing structure cavity, that is, the transverse diameter of the semi-circular structure of the airway mixing structure cavity, is less than or equal to 5 mm. At the center of the bottom of the airway mixing structure cavity, there is an air outlet slit; The vent slit is positioned along the length of the rod core.

7. The electrical structure for static electricity elimination according to claim 3, characterized in that: The two plate-shaped horizontal air intake chambers are located below the upper semi-circular tunnel of the airway mixing structure cavity, and the upper boundary of the two plate-shaped horizontal air intake chambers is at the same horizontal level as the horizontal diameter line of the upper semi-circular tunnel of the airway mixing structure cavity. The thickness H of each of the said plate-shaped horizontal air intake chambers is less than or equal to 0.25 mm; The two plate-shaped horizontal air intake chambers are set on the same horizontal plane, or on different horizontal planes; Relative to the longitudinal centerline or longitudinal center plane of the airway mixing structure cavity, the two plate-shaped horizontal air intake cavities have the same symmetrical included angle; Alternatively, the two plate-shaped horizontal air intake chambers have different included angles relative to the longitudinal centerline or longitudinal center plane of the airway mixing structure cavity.

8. The electrical structure for static electricity elimination according to claim 3, characterized in that: The sweeping frequency of the sweeping airflow generated by the electrical structure satisfies the following condition:

9. The electrical structure for static electricity elimination according to claim 1, characterized in that: Two airflows, one from the first and the other from the second cylindrical air inlet channels, enter the core of the ion air bar. They meet and mix in the air mixing structure cavity to form a mixed airflow. The mixed airflow is then output through an outlet slit located on one side of the air mixing structure cavity to form a swept ion airflow with a set sweep angle.

10. The electrical structure for static electricity elimination according to claim 1, characterized in that: The two airflows input into the ion bar core from the first and second cylindrical air inlet channels meet and mix in the airway mixing structure cavity to form a mixed airflow. The mixed airflow is output through the air outlet slit located on one side of the airway mixing structure cavity to form a swingable curtain-like or screen-like ion airflow.

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