Opposite ion array charging device

Abstract

The utility model relates to an opposed ion array charging device. The ion array charging device comprises an anode frame and a plurality of cathode metal needles. The anode frame comprises a plurality of holes formed by lapping metal bars, the cathode metal needles are in one-to-one correspondence with the holes, the anode frame is connected with a positive electrode of a high-voltage power supply, and the cathode metal needles are connected with a negative electrode of the high-voltage power supply. Therefore, the charging capacity of the device can be increased, the resistance is reduced, the thickness of the product is very low, and installation and implementation are convenient. Meanwhile, due to the scheme, materials can be remarkably saved, the equipment has low requirements on the production process and tolerance, the processing cost is extremely low, and the cost is remarkably reduced.

Description

Technical Field

[0001] This utility model relates to the field of electrostatic dust removal technology, and in particular to a counter-type ion array charging device. Background Technology

[0002] Electrostatic filters have been widely used and developed due to their advantages such as low air resistance and reusability. An electrostatic filter typically consists of two parts: a charging device and a filtering device. The charging device charges fine particulate matter in the air, making it electrically charged. The filtering device uses an electrostatic field to attract these charged particles, achieving air purification.

[0003] For applications requiring high single-pass filtration efficiency, devices are needed to provide a high-density ion curtain across the entire ventilation area in the duct, charging the passing fine particles. These devices can be called ion array charging devices, or simply charging devices. Because electrostatic filters typically need to handle large duct areas, charging devices require an array of multiple ion generating units to achieve surface charging.

[0004] How to design a lower-cost charging device without significantly affecting the charging effect (i.e., purification efficiency) is a technical problem that urgently needs to be solved. Summary of the Invention

[0005] One of the technical problems this invention aims to solve is how to design a charging device with a lower cost without significantly affecting the charging effect (i.e., purification efficiency).

[0006] This utility model provides an opposed-type ion array charging device, comprising: an anode frame, the anode frame including a plurality of holes formed by overlapping metal rods; a plurality of cathode metal needles, the cathode metal needles corresponding one-to-one with the holes, the anode frame being connected to the positive terminal of a high-voltage power supply, and the cathode metal needles being connected to the negative terminal of a high-voltage power supply.

[0007] Optionally, the hole is square, or the hole is a rectangle with an aspect ratio less than or equal to a predetermined value.

[0008] Optionally, the cathode metal needle is located at the geometric center of its corresponding hole.

[0009] Optionally, the plurality of cathode metal needles are arranged at equal intervals; and the plurality of holes are arranged at equal intervals.

[0010] Optionally, the center-to-center distance between two adjacent holes is between 20mm and 200mm.

[0011] Optionally, the diameter of the metal rod is between 1 mm and 5 mm.

[0012] Optionally, the metal rod is a solid cylindrical rod with a diameter between 1 mm and 2.5 mm, or the metal rod is a hollow cylindrical tube with a diameter between 2 mm and 5 mm.

[0013] Optionally, the cathode metal needle is a cone with a tip angle of less than 20°, or the cathode metal needle is a metal wire with a diameter of less than 0.5 mm.

[0014] Optionally, the metal rod is made of aluminum, iron, copper, zinc, or an alloy of metals, or the cathode metal needle is made of tungsten, titanium, iron, or an alloy of metals.

[0015] Optionally, multiple transverse metal rods and multiple longitudinal metal rods are fixed on the anode frame to form multiple holes, or multiple transverse metal rods and multiple longitudinal metal rods are first fixed together to form a metal mesh including multiple holes, and then the metal mesh is fixed to the anode frame.

[0016] Therefore, the ion array charging device of this invention uses overlapping metal rods to form holes that correspond one-to-one with the cathode metal needles, thus forming an anode frame with multiple holes. This increases the charging capacity of the device, reduces resistance, and the product has a very low thickness, facilitating installation. Furthermore, this solution significantly saves materials, has low requirements for manufacturing processes and tolerances, and results in extremely low processing costs, leading to a significant cost reduction. Attached Figure Description

[0017] The above and other objects, features and advantages of the present invention will become more apparent from the accompanying drawings, in which like reference numerals generally represent like parts.

[0018] Figure 1 A schematic diagram of a wire plate-type charging device is shown.

[0019] Figure 2 A schematic diagram of a conventional pinhole charging device is shown.

[0020] Figure 3 A schematic diagram of an ion array charging device according to an embodiment of the present invention is shown. Detailed Implementation

[0021] Preferred embodiments of the present invention will now be described in more detail with reference to the accompanying drawings. While preferred embodiments of the present invention are shown in the drawings, it should be understood that the present invention may be implemented in various forms and should not be limited to the embodiments set forth herein. Rather, these embodiments are provided so that the present invention will be thorough and complete, and will fully convey the scope of the present invention to those skilled in the art.

[0022] A charging device is usually divided into two parts: a cathode and an anode.

[0023] A finer, sharper cathode is more likely to release negative ions, so a needle tip or a thin wire can be used as the cathode.

[0024] The common practice for anodes is to use metal plates, because the ion generator and electrostatic filter of the equipment are usually integrated into one design. In addition to serving as the anode of the ion generator, the anode also has the function of dust collection.

[0025] Figure 1 A schematic diagram of a wire plate-type charging device is shown.

[0026] like Figure 1 As shown, the wire-plate charging device is an ion generating array with metal wires as cathodes and metal plates parallel to the ventilation direction as anodes, arranged in a one-dimensional parallel configuration.

[0027] The advantage of a plate-type charging device is that when the charging device and the dust collection device are designed as an integrated unit, the anode can be combined with the dust collection metal plate, thereby reducing the complexity of the product.

[0028] The main problems with wire-plate charging devices are high operating current and high ozone emissions. To minimize these issues, the cathode charging wire needs to be made of a thinner material. However, the thinner the charging wire, the more prone it is to damage due to aging. Simultaneously, the anode also undergoes certain treatments, such as avoiding sharp or pointed edges. The presence of such edges significantly degrades the performance of the charging device. Using a metal plate as the anode results in relatively sharp edges; therefore, this type of anode typically requires a certain width to keep the edges away from the cathode.

[0029] Furthermore, when the charging device is designed as an independent pre-charging device instead of being coupled to the downstream electrostatic filtration unit, the aforementioned wire-plate type charging device exhibits many drawbacks. For example, the device needs to be very thick, has high cost, and exhibits low performance, high operating current, and high concentration of ozone as a byproduct.

[0030] To improve the above situation, this utility model proposes an opposed-type ion array charging device.

[0031] The ion array charging device of this invention can be regarded as a pinhole charging device.

[0032] Figure 2 A schematic diagram of a conventional pinhole charging device is shown.

[0033] like Figure 2 As shown, a conventional pinhole charging device uses a perforated metal plate as the anode and a metal tip as the cathode, forming a two-dimensional array. The anode of a pinhole charging device is usually a complete conductive sheet perpendicular to the ventilation direction, such as a stainless steel plate with a perforation. The cathode is usually a tungsten needle or a stainless steel needle placed at the center of the anode opening.

[0034] The advantages of this conventional pinhole charging device are that the aperture shape can be any shape, such as circular or square with rounded corners, and the entire anode is a complete plane. This is because, traditionally, the more uniform the distance between the anode and cathode, the better. The disadvantages of this approach are relatively high resistance, significant material waste in the anode aperture manufacturing process, high production difficulty, and therefore very high costs. Furthermore, since the metal plate used is typically less than 1mm thick, this approach is equivalent to discharging onto a thin circular ring. The sidewalls of this ring cannot be perfectly smooth due to manufacturing limitations, making this ring a less than ideal anode design.

[0035] Unlike conventional pinhole charging devices, this invention proposes a two-dimensional opposed ion array charging device that can be constructed by using metal rods stacked together to form a metal mesh (i.e., an anode frame).

[0036] Specifically, the ion array charging device of this invention may include an anode frame and multiple cathode metal needles. The anode frame includes multiple holes formed by overlapping metal rods. Each cathode metal needle corresponds to one of the holes. The anode frame can be connected to the positive terminal of a high-voltage power supply, and the cathode metal needles can be connected to the negative terminal of the high-voltage power supply.

[0037] The multiple cathode metal pins and the multiple holes included in the anode frame can all be arranged at equal intervals. The center-to-center distance between two adjacent holes can be between 20 mm and 200 mm. The cathode metal pins can be located at the geometric center of their corresponding holes. There can also be a certain distance between the cathode metal pins and their corresponding holes, which can be between 10 mm and 100 mm.

[0038] Figure 3 A schematic diagram of an ion array charging device according to an embodiment of the present invention is shown.

[0039] like Figure 3As shown, the anode of the ion array charging device of this invention is an anode frame. The entire anode frame can be considered as a metal frame with multiple rectangular holes, formed by multiple horizontal metal rods and multiple vertical metal rods. That is, the anode frame can be considered as a metal mesh formed by the crisscrossing of metal rods.

[0040] In some exemplary embodiments, multiple transverse metal rods and multiple longitudinal metal rods can be directly fixed to the anode frame (i.e., the frame body) to form multiple holes. That is, the transverse metal rods and longitudinal metal rods can be directly fixed to the anode frame.

[0041] In other exemplary embodiments, multiple transverse metal rods and multiple longitudinal metal rods may be fixed together to form a metal mesh including multiple holes, and then the metal mesh may be fixed to the anode frame. The transverse and longitudinal metal rods may be fixed together by means of, but not limited to, welding or adhesive bonding to form the metal mesh.

[0042] It should be understood that the shape of the holes formed by overlapping metal rods in the anode frame of this invention is not limited to rectangles or squares, but can also be triangular (such as equilateral triangles), hexagonal (such as regular hexagons), etc. However, square and rectangular holes are obviously the simplest to implement, and therefore, square and rectangular holes are preferred as the basic charging units of the ion array. Furthermore, when selecting rectangular holes, the rectangle can refer to a rectangle with a length-to-width ratio that is not too large, i.e., a length-to-width ratio less than or equal to a predetermined value. For example, the predetermined value can be 2. It should be understood that this invention does not impose special restrictions on the specific value of the predetermined value, as long as the predetermined value is not particularly large, ensuring that the length-to-width ratio of the rectangular hole is not too large.

[0043] In practical applications, various metals can be used to make the metal rod. That is, this invention does not impose special limitations on the material of the metal rod. For example, the metal rod can be made of aluminum, iron, copper, zinc, or alloys of metals (such as aluminum, iron, copper, and zinc). Furthermore, the metal rod can be a solid cylindrical rod or a hollow cylindrical tube. Considering factors such as improving the charging capacity of the charging device and reducing costs, the diameter of the metal rod should not be too small or too large. For example, the diameter of the metal rod can be between 1 mm and 5 mm. For instance, the metal rod can be a solid cylindrical rod with a diameter between 1 mm and 2.5 mm. As another example, the metal rod can also be a hollow cylindrical tube with a diameter between 2 mm and 5 mm.

[0044] To enhance the discharge capability of the cathode, the cathode metal needle can be a cone with a tip angle of less than 20°, or it can be a metal wire with a diameter of less than 0.5 mm. The cathode metal needle can be made of one of the following materials: tungsten, titanium, iron, or alloys of metals (such as tungsten, titanium, and iron).

[0045] The following experiments were conducted using the same test conditions, employing stainless steel wires of different thicknesses as metal rods. A perforated stainless steel plate anode was used as the reference group, while stainless steel wires of different diameters were used as the experimental group for comparative testing.

[0046] The experimental data are shown in the table below.

[0047]

[0048] As can be seen from the data in the table above, the performance of 0.5mm diameter steel wire is much worse than that of the reference group. The performance of 1.0mm and 1.5mm diameter steel wire is basically the same as that of the reference group, while the performance of 2.5mm diameter steel wire is better than that of the reference group.

[0049] As can be seen, using stainless steel wire with a diameter ≥1mm as the anode of the charging device can effectively increase the effective operating voltage of the charging device, thereby improving its charging capacity and achieving the goal of improving the system's purification efficiency. At the same time, due to the structural change, the ventilation area increases significantly, leading to a decrease in the resistance of the charging device. Further increasing the wire diameter will further improve performance, with a slight increase in resistance, but the increase is very small. Considering cost and practicalities, the thickness of the metal wires composing the mesh should not be too high, and should be less than or equal to 5mm.

[0050] Furthermore, the data shows that the charging capability of the pinhole-type two-dimensional matrix charging device does not have high requirements on the shape of the anode itself. Although theoretically the distance between the anode and cathode should be strictly equal, actual test results show that the performance of the anode frame using overlapping metal rods is not that of a standard circular anode. The spatial misalignment caused by the overlapping of horizontal and vertical metal rods did not appear to affect performance. In addition, this invention included an experiment where the cross-shaped intersections of a metal mesh composed of metal wires were shielded with conductive material to form arcs, but this configuration did not further improve the performance of the metal mesh anode. Therefore, some processing errors in actual production have little impact on the performance of the charging device. This also demonstrates the strong practicality of the ion array charging device of this invention.

[0051] This utility model discloses an opposed-type ion array charging device that uses a metal needle as the cathode and a metal rod as the anode. This increases the charging capacity of the device, reduces resistance, and the product has a very low thickness, facilitating installation. Furthermore, this design significantly saves materials, has low requirements for manufacturing processes and tolerances, and results in extremely low processing costs, leading to a significant cost reduction.

[0052] The various embodiments of the present invention have been described above. These descriptions are exemplary and not exhaustive, nor are they limited to the disclosed embodiments. Many modifications and variations will be apparent to those skilled in the art without departing from the scope and spirit of the described embodiments. The terminology used herein is chosen to best explain the principles, practical application, or improvement of the technology in the market, or to enable others skilled in the art to understand the embodiments disclosed herein.

Claims

1. A counter-type ion array charging device, characterized in that, include: An anode frame, the anode frame comprising a plurality of holes formed by overlapping metal rods; Multiple cathode metal needles, each corresponding to a hole. The anode frame is connected to the positive terminal of the high-voltage power supply, and the cathode metal needle is connected to the negative terminal of the high-voltage power supply.

2. The ion array charging device according to claim 1, characterized in that, The hole is square, or The hole is a rectangle with an aspect ratio less than or equal to a predetermined value.

3. The ion array charging device according to claim 1, characterized in that, The cathode metal needle is located at the geometric center of its corresponding hole.

4. The ion array charging device according to claim 1, characterized in that, The plurality of cathode metal needles are arranged at equal intervals; and The multiple holes are arranged at equal intervals.

5. The ion array charging device according to claim 1, characterized in that, The center-to-center distance between two adjacent holes is between 20mm and 200mm.

6. The ion array charging device according to claim 1, characterized in that, The diameter of the metal rod is between 1 mm and 5 mm.

7. The ion array charging device according to claim 6, characterized in that, The metal rod is a solid cylindrical rod with a diameter between 1 mm and 2.5 mm, or the metal rod is a hollow cylindrical tube with a diameter between 2 mm and 5 mm.

8. The ion array charging device according to claim 1, characterized in that, The cathode metal needle is conical with a tip angle of less than 20°, or The cathode metal needle is a metal wire with a diameter of less than 0.5 mm.

9. The ion array charging device according to claim 1, characterized in that, The metal rod is made of aluminum, iron, copper, zinc, or an alloy of metals, or the cathode metal needle is made of tungsten, titanium, iron, or an alloy of metals.

10. The ion array charging device according to claim 1, characterized in that, Multiple transverse metal rods and multiple longitudinal metal rods are fixed on the anode frame to form multiple holes, or multiple transverse metal rods and multiple longitudinal metal rods are first fixed together to form a metal mesh including multiple holes, and then the metal mesh is fixed to the anode frame.

Images