A shower electrode nozzle for static elimination

Abstract

A sweeping electrode nozzle for electrostatic elimination, belonging to the field of electrostatic elimination, includes an electrode needle, an electrode needle fixing element, and an electrode base. On the upper surface of the electrode base, on both sides of the electrode needle fixing element, two elongated air channels and an airflow inlet are mirror-arranged. A mixing chamber is located at the center of the electrode needle base. At the center of the lower surface of the electrode base, an elongated air channel and an airflow outlet are located. An air channel structure is located inside the electrode needle base. An air outlet slit of the air channel structure is located at the center of the bottom of the mixing chamber. The air channel structure includes first and second plate-shaped vertical air inlet chambers, and first and second plate-shaped horizontal air inlet chambers. The two plate-shaped horizontal air inlet chambers are connected to the air passage of the mixing chamber, forming the first and second air inlets of the mixing chamber. By employing a dual-inlet airflow and a mixing chamber air channel structure, and utilizing the instability of turbulence, a swingable curtain-like or screen-like ion airflow is formed to achieve a longer electrostatic elimination distance and a wider electrostatic elimination range.

Description

Technical Field

[0001] This utility model belongs to the field of static electricity elimination, and in particular relates to an electrode nozzle for an ion air bar. 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 structures of existing ion air bar electrode nozzles can be referenced in the following patent documents:

[0005] 1) The invention patent "Electrostatic Removal Device" with an authorization announcement date of January 20, 2016 and authorization announcement number CN103477720B;

[0006] 2) The invention patent application "Discharge Electrode Socket" with publication date of November 18, 2009 and publication number CN 101584254A;

[0007] 3) The invention patent "Static Eliminator" with the authorization announcement date of August 14, 2013 and authorization announcement number CN101472380B.

[0008] The structural features of the electrode nozzle and needle holder described in the invention patent "Electrostatic Removal Device" with authorization announcement number CN103477720B (see attached figure 8 in its specification) are: the air passage directly contacts and wraps around the electrode needle, the airflow flows out along the electrode needle through the air passage, and the outgoing airflow is in a straight line.

[0009] In the invention patent application "Discharge Electrode Socket" with publication number CN 101584254A, the electrode nozzle and needle holder (see its specification appendix) are described. Figure 1 The structural features of the air passage are: the air passage does not directly or completely contact or wrap the electrode needle, but is set on both sides of the electrode needle. The airflow flows out from both sides of the electrode needle through the air passage, and the outflow of the air passage from each air passage hole is in a straight line.

[0010] The invention patent "Static Eliminator" with authorization announcement number CN101472380B features an electrode nozzle and needle holder (see Figure 18 in its specification) with the following structural characteristics: it combines the two air passage structures mentioned above. At the axial center of the electrode nozzle and needle holder, the air passage directly contacts and wraps around the electrode needle, and the airflow flows out along the electrode needle through the air passage; while the auxiliary air passages located on both sides and around the electrode needle allow the airflow to flow out from both sides and around the electrode needle (see auxiliary air holes 37 in Figure 4 in its specification), and the outgoing airflow from each air passage hole is in a straight line.

[0011] In practical use, the above-mentioned existing technical solutions have been found to have the following technical defects:

[0012] 1) The output airflow pattern is all straight, and the diffusion range is very limited, resulting in a limited ion transport range and ultimately a small electrostatic elimination range.

[0013] 2) The air channels and pores around the electrode needle or discharge electrode, which play an auxiliary role, do not effectively cover and wrap the electrode needle. Therefore, their auxiliary ion transport effect is not ideal, which also results in a small static electricity elimination range.

[0014] 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

[0015] The purpose of this invention is to provide a sweeping electrode nozzle for static electricity elimination. It employs a dual-inlet air intake and a mixing chamber airway structure. Utilizing the instability of turbulence, the nozzle forms a sweeping ion airflow (also known as a swingable curtain or screen-like ion airflow) to achieve a longer static electricity elimination distance and a wider static electricity elimination range.

[0016] The technical solution of this utility model is: to provide a sweeping electrode nozzle for electrostatic elimination, comprising an electrode needle, an electrode needle holder, and an electrode base, wherein the electrode needle and the electrode needle holder are embedded together, and the lower half of the electrode needle holder has threads to achieve mechanical fixation with the electrode base; its characteristic is:

[0017] On the upper surface of the electrode holder, on both sides of the electrode needle fixing component, two long strip-shaped air channels and airflow inlets are mirror-shaped.

[0018] A mixing chamber is set at the center of the electrode needle holder;

[0019] A long strip-shaped airway and an airflow outlet are provided at the center of the lower surface of the electrode holder;

[0020] An airway structure is provided inside the electrode needle holder;

[0021] A slit with an air passage structure is set at the center of the bottom of the mixing chamber;

[0022] The airway structure includes two pairs of mirror-image first plate-shaped vertical air intake chambers and second plate-shaped vertical air intake chambers, as well as a first plate-shaped horizontal air intake chamber and a second plate-shaped horizontal air intake chamber.

[0023] The first plate-shaped vertical air intake chamber and the first plate-shaped horizontal air intake chamber are connected end to end in sequence, and the air passages are interconnected;

[0024] The second plate-shaped vertical air intake chamber and the second plate-shaped horizontal air intake chamber are connected end to end in sequence, and the air passages are interconnected.

[0025] The ends of the first and second plate-shaped horizontal air inlet chambers are connected to the mixing chamber air passage located at the center of the electrode needle seat.

[0026] The first plate-shaped vertical air intake chamber and the first plate-shaped horizontal air intake chamber constitute the first air intake of the mixing chamber;

[0027] The second plate-shaped vertical air intake chamber and the second plate-shaped horizontal air intake chamber constitute the second air intake of the mixing chamber.

[0028] Specifically, along the length of the ion wind bar, the longitudinal cross-sectional structure of the mixing chamber is divided into an upper half and a lower half; the upper half of the mixing chamber is semi-circular; and the lower half of the mixing chamber is a square with rounded corners.

[0029] Furthermore, at the center of the bottom of the mixing chamber, a two-dimensional stretching slit with a contraction followed by expansion is provided; the contraction angle and expansion angle of the slit are the same, and the extension lines of the contraction section and the expansion section of the slit form a vertical angle.

[0030] Specifically, the first and second plate-shaped horizontal air intake chambers are located below the semi-circular tunnel above the mixing chamber.

[0031] Furthermore, the upper boundaries of the first and second plate-shaped horizontal air intake chambers are on the same horizontal line or horizontal plane as the horizontal diameter line of the semi-circular tunnel in the mixing chamber.

[0032] Specifically, the airway structure is a two-dimensional stretched structure; the thickness H of the first and second plate-shaped horizontal air intake chambers is less than or equal to 0.25 mm.

[0033] Specifically, the first and second plate-shaped horizontal air intake chambers are arranged on the same horizontal plane; or, the first and second plate-shaped horizontal air intake chambers are arranged on different horizontal planes.

[0034] Furthermore, the first and second plate-shaped horizontal air intake chambers are mirror images of each other at the same included angle relative to the centerline of the longitudinal cross-section of the mixing chamber, or the first and second plate-shaped horizontal air intake chambers are set at different included angles.

[0035] Specifically, the airflow ejected from the outlet slit is a sweeping airflow, which can sweep out the ion airflow at a set sweeping angle, or eject an oscillating curtain-like or screen-like ion airflow.

[0036] Furthermore, a snap-fit ​​structure is provided on the upper half of the electrode needle fastener to enable the installation and fixation of the electrode needle fastener and the ion wind rod body.

[0037] Compared with the prior art, the advantages of this utility model are:

[0038] 1. The technical solution of this utility model adopts a dual-intake mixing chamber airway structure to form a sweeping airflow pattern (also known as a swingable curtain-like or curtain-like ion airflow), which expands the ion delivery range and thus expands the power elimination range.

[0039] 2. The technical solution of this utility model does not require the setting of an auxiliary air channel. The electrode needle is completely wrapped in the sweeping airflow, which increases the ion transport efficiency, allows more ions to be transported to a greater distance more quickly, and increases the static elimination distance and range.

[0040] 3. The technical solution of this utility model has a certain "mixing" effect on positive and negative ions by the sweeping airflow formed by the electrode nozzle, which is beneficial to improving the ion balance performance of the ion wind bar. Attached Figure Description

[0041] Figure 1 This is a schematic diagram of the electrode nozzle shaft side of this technical solution;

[0042] Figure 2 This is another axial view of the electrode nozzle in this technical solution;

[0043] Figure 3-1 This is a front view of the electrode nozzle in this technical solution;

[0044] Figure 3-2 This is a side view of the electrode nozzle in this technical solution;

[0045] Figure 3-3 This is a top view of the electrode nozzle in this technical solution;

[0046] Figure 3-4 This is a bottom view of the electrode nozzle in this technical solution;

[0047] Figure 4-aA schematic diagram of the air passage structure in this technical solution, showing the first and second horizontal air intake chambers arranged at a 180° angle (at the same horizontal position);

[0048] Figure 4-1 A schematic diagram of the cross-section of the air passage structure in this technical solution, showing the first and second horizontal air intake chambers arranged at a 180° angle (at the same horizontal position);

[0049] Figure 4-2 A schematic diagram of the cross-section of the air passage structure in this technical solution, showing the first and second horizontal air intake chambers arranged at different horizontal positions;

[0050] Figure 4-3 A schematic cross-sectional view of the air passage structure in this technical solution, showing the first and second horizontal air intake chambers arranged at a 204° angle.

[0051] Figure 4-4 A schematic cross-sectional view of the air passage structure in this technical solution, showing the first and second horizontal air intake chambers arranged at a 90° angle.

[0052] Figure 5-1 A schematic diagram of the flow field simulation at t = 27.7 ms for the air duct structure with the first and second horizontal air inlets of this technical solution set at a 180° angle (at the same horizontal position);

[0053] Figure 5-2 A simulation diagram of the flow field at t=29.5ms for the air duct structure with the first and second horizontal air inlets of this technical solution arranged at a 180° angle (at the same horizontal position).

[0054] Figure 5-3 A flow field simulation diagram of the air duct structure with the first and second horizontal air inlets of this technical solution set at a 180° angle (at the same horizontal position) at t=31.3ms;

[0055] Figure 6-1 To and Figure 5-1 A schematic diagram of the flow field simulation on the cross section where the center line of the electrode needle axis is located;

[0056] Figure 6-2 To and Figure 5-2 A schematic diagram of the flow field simulation on the cross section where the center line of the electrode needle axis is located;

[0057] Figure 6-3 To and Figure 5-3 A schematic diagram of the flow field simulation along the cross-section of the corresponding electrode needle axis centerline.

[0058] Wherein: 1 is the electrode needle, 2 is the electrode needle fixture, 3 is the electrode needle seat, 4 is the air passage structure inside the electrode needle seat, 4-1 is the air inlet of the electrode nozzle, 4-2 is the first vertical air inlet chamber, 4-2' is the second vertical air inlet chamber, 4-3 is the first horizontal air inlet chamber, 4-3' is the second horizontal air inlet chamber, 4-3'-a is the horizontal air inlet chamber, 4-3-1 and 4-3'-b are 204° angled air inlets, 4-3-2 and 4-3'-c are 90° angled air inlets, 4-4 is the mixing chamber, 4-5 is the contraction section, 4-6 is the air outlet slit, 4-7 is the expansion section; 4-8 is the air outlet of the electrode nozzle. Detailed Implementation

[0059] To make the above-mentioned inventive objectives and beneficial effects of this technical solution more apparent and understandable, the specific implementation methods of this technical solution will be further described below in conjunction with the accompanying drawings and embodiments:

[0060] See Figure 1 , Figure 2 As shown in the figure, the electrode nozzle of this technical solution mainly consists of electrode needle 1, electrode needle fastener 2, and electrode seat 3.

[0061] Electrode needle 1 and electrode needle fastener 2 are embedded as one piece. The lower half of the surface of electrode needle fastener 2 is threaded to achieve mechanical fixation with electrode seat 3. The upper half of electrode needle fastener 2 can be provided with a snap-fit ​​structure to achieve installation with ion wind rod body.

[0062] The center of the boss on the electrode holder 3 is provided with an internal thread, which allows for assembly with the aforementioned electrode needle fastener 2; after assembly, the tip of the electrode needle is located near the vent slit 4-6 of the electrode needle holder 3 (see...). Figure 3-1 ).

[0063] A snap-fit ​​structure can also be provided on the protrusion of the electrode holder 3 to facilitate the installation of the ion wind rod.

[0064] Combination Figure 3-3 On the upper surface of the electrode holder, on both sides of the electrode needle fixing component, a pair of elongated air channels and airflow inlets 4-1 are mirrored.

[0065] Combination Figure 3-4 At the center of the lower surface of the electrode holder, a long strip-shaped airway and an airflow outlet 4-8 are provided, and the outlet area is smaller than the sum of the areas of the two inlets.

[0066] See Figure 4-a , Figure 4-1As shown, an air passage structure 4 is provided inside the electrode needle holder 3. This air passage is a two-dimensional stretched structure. It includes two pairs of mirror-image plate-shaped vertical air inlet chambers 4-2 and 4-2', and plate-shaped horizontal air inlet chambers 4-3 and 4-3'. The two plate-shaped horizontal air inlet chambers are finally connected to the mixing chamber 4-4 located at the center of the electrode needle holder.

[0067] The mixing chamber 4-4 causes the airflow entering from the first and second plate-shaped horizontal air inlets 4-3 and 4-3' (referred to as the two plate-shaped horizontal air inlets) to oscillate. Looking along the length of the ion bar (i.e., the longitudinal cross-section of the ion bar), the structure of the mixing chamber 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 mixing chamber, there is a two-dimensional stretching slit 4-6 that first contracts (segment 4-5 in the figure) and then expands (segment 4-7 in the figure). The contraction angle and expansion angle of the slit are the same, and the extension lines of the contraction segment 4-5 and the expansion segment 4-6 form a vertical angle. This arrangement is to ensure that the sweeping airflow flowing out from the slit 4-6 can sweep at the set sweeping angle to the maximum extent. The contraction segment 4-5 can also make the formed sweeping airflow more symmetrical and stable within the sweeping angle.

[0068] Preferably, to achieve a larger outgoing airflow sweep angle and accelerate the formation of the sweeping airflow, the two plate-shaped horizontal air inlets 4-3 and 4-3' should be located below the upper semi-circular tunnel of the mixing chamber 4-4, and the upper boundary of the plate-shaped horizontal air inlets should be aligned with the horizontal diameter line of the upper semi-circular tunnel of the mixing chamber 4-4. Figure 4-1 The magenta dashed line in the middle is the same horizontal line.

[0069] Preferably, in order to make it easier for the two airflows entering the mixing chamber 4-4 to oscillate and thus more easily form a sweeping airflow, the thickness H of the first and second plate-shaped horizontal air intake chambers can be set to less than or equal to 0.25 mm.

[0070] Optional, see Figure 4-2 To accelerate the formation of the sweeping airflow, the first and second plate-shaped horizontal air intake chambers 4-3 and 4-3'-a can be set on different horizontal planes.

[0071] Optionally, see Figure 4-3 As shown, setting the first and second air intake chambers 4-3-1 and 4-3'-b at a 204° angle (i.e., the air intake angle α equals 204°) can also form a sweeping airflow.

[0072] Optionally, see Figure 4-4 As shown, setting the second air intake chambers 4-3-2 and 4-3'-c at a 90° angle (i.e., the air intake angle α equals 90°) can also form a sweeping airflow, but the sweeping effect is not as good as the other three settings.

[0073] Example:

[0074] To verify the feasibility of the electrode nozzle structure of this technical solution, a simulation test was conducted on the airflow field formed by its internal air passage structure using a Realizable k-ε turbulence mathematical model.

[0075] The airway structural parameters for the simulation test are as follows:

[0076] Figure 4-a , Figure 4-1 The thickness H of the horizontal intake chamber (i.e., the intake angle α equals 180°) is set to 0.25 mm, and the characteristic dimension D of the mixing chamber is set to 5 mm.

[0077] See simulation test results Figure 5-1 , 5-2 5-3 and Figure 6-1 , Figure 6-2 , Figure 6-3 As shown.

[0078] As can be seen from the figure, from Figure 5-1 , 5-3 and Figure 6-1 , Figure 6-3 A distinctly symmetrical sweeping airflow can be observed.

[0079] The technical solution of this utility model adopts a dual-inlet mixing chamber airway structure to form a sweeping airflow pattern (also known as a swingable curtain-like or screen-like ion airflow), which expands the ion transport range and thus expands the static elimination range. Its electrode needle is completely wrapped in the sweeping airflow, which increases the ion transport efficiency and allows more ions to be transported to a greater distance more quickly, increasing the static elimination distance and range. The sweeping airflow formed by its electrode nozzle plays a certain "mixing" role for positive and negative ions, which is beneficial to improving the ion balance performance of the ion bar.

[0080] This invention can be widely used in the design and manufacturing of ion air bar electrode nozzles.

Claims

1. A sweeping electrode nozzle for electrostatic elimination, comprising an electrode needle, an electrode needle holder, and an electrode base, wherein the electrode needle and the electrode needle holder are integrally embedded, and the lower half of the electrode needle holder has threads for mechanical fixation to the electrode base; characterized in that: On the upper surface of the electrode holder, on both sides of the electrode needle fixing component, two long strip-shaped air channels and airflow inlets are mirror-shaped. A mixing chamber is set at the center of the electrode needle holder; A long strip-shaped airway and an airflow outlet are provided at the center of the lower surface of the electrode holder; An airway structure is provided inside the electrode needle holder; A slit with an air passage structure is set at the center of the bottom of the mixing chamber; The airway structure includes two pairs of mirror-image first plate-shaped vertical air intake chambers and second plate-shaped vertical air intake chambers, as well as a first plate-shaped horizontal air intake chamber and a second plate-shaped horizontal air intake chamber. The first plate-shaped vertical air intake chamber and the first plate-shaped horizontal air intake chamber are connected end to end in sequence, and the air passages are interconnected; The second plate-shaped vertical air intake chamber and the second plate-shaped horizontal air intake chamber are connected end to end in sequence, and the air passages are interconnected. The ends of the first and second plate-shaped horizontal air inlet chambers are connected to the mixing chamber air passage located at the center of the electrode needle seat. The first plate-shaped vertical air intake chamber and the first plate-shaped horizontal air intake chamber constitute the first air intake of the mixing chamber; The second plate-shaped vertical air intake chamber and the second plate-shaped horizontal air intake chamber constitute the second air intake of the mixing chamber.

2. The sweeping electrode nozzle for static elimination according to claim 1, characterized in that: Along the length of the ion wind bar, the longitudinal cross-sectional structure of the mixing chamber is divided into two parts: an upper half and a lower half. The upper part of the mixing chamber is semi-circular; The lower half of the mixing chamber is a square with rounded corners.

3. The sweeping electrode nozzle for static elimination according to claim 1, characterized in that... At the center of the bottom of the mixing chamber, there is a two-dimensional stretching slit that first contracts and then expands. The contraction angle and expansion angle of the vent slit are the same, and the extension lines of the contraction segment and the expansion segment of the vent slit form a vertical angle.

4. The sweeping electrode nozzle for static elimination according to claim 1, characterized in that: The first and second plate-shaped horizontal air intake chambers are located below the semi-circular tunnel above the mixing chamber.

5. The sweeping electrode nozzle for static elimination according to claim 1, characterized in that: The upper boundaries of the first and second plate-shaped horizontal air intake chambers are on the same horizontal line or horizontal plane as the horizontal diameter line of the semi-circular tunnel in the mixing chamber.

6. The sweeping electrode nozzle for static elimination according to claim 1, characterized in that: The airway structure described is a two-dimensional stretched structure; The thickness H of the first and second plate-shaped horizontal air intake chambers is less than or equal to 0.25 mm.

7. The sweeping electrode nozzle for static elimination according to claim 1, characterized in that: The first and second plate-shaped horizontal air intake chambers are arranged on the same horizontal plane; or, the first and second plate-shaped horizontal air intake chambers are arranged on different horizontal planes.

8. The sweeping electrode nozzle for static elimination according to claim 1, characterized in that... The first and second plate-shaped horizontal air intake chambers are mirror images of each other at the same angle relative to the centerline of the longitudinal cross-section of the mixing chamber, or the first and second plate-shaped horizontal air intake chambers are set at different angles.

9. The sweeping electrode nozzle for static elimination according to claim 1, characterized in that: The airflow ejected from the outlet slit is a sweeping airflow, which can sweep out the ion airflow at a set sweeping angle, or eject an oscillating curtain-like or screen-like ion airflow.

10. The sweeping electrode nozzle for static elimination according to claim 1, characterized in that... A snap-fit ​​structure is provided on the upper half of the electrode needle fastener to enable the installation and fixation of the electrode needle fastener and the ion wind rod body.

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