Electrode strip and electrostatic adsorption type oil fume removing device
Patent Information
- Application Number
- CN202522652143.7
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-12-15
- Publication Date
- 2026-11-03
- Estimated Expiration
- 2035-12-15
AI Technical Summary
In traditional electrostatic adsorption fume extractors, the electrode wires are prone to shifting or sagging, leading to an unstable electric field. This causes oily fumes to accumulate on the inner wall of the chamber, increasing maintenance difficulty and cost.
The electrode sheets are spliced together using a mortise and tenon structure to form a cross-shaped integrated structure, which is fixed with threads to ensure that the electrode strips are precisely aligned in the chamber. The square chamber design of the honeycomb panel achieves balanced adsorption of oil fumes, and the electrostatic voltage is controlled at 11.0-12.0KV.
It improves the stability and efficiency of electrostatic adsorption, reduces maintenance costs, and is suitable for high-intensity oil fume adsorption in heavy oil fume scenarios.
Smart Images
Figure CN224926243U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of electrostatic adsorption particulate matter separation technology, and in particular to an electrode strip and an electrostatic adsorption oil fume removal device. Background Technology
[0002] Kitchens, especially those in catering establishments, generate large amounts of oily fumes during operation. The purification of these fumes is a major challenge in current kitchen environmental management. Oily fumes contain tiny particles smaller than 2.5μm in diameter, significantly contributing to the rise of PM2.5 in the air. They also contain numerous harmful gases, as well as organic compounds such as benzene compounds, alkanes, alkenes, and halogenated hydrocarbons, which pollute the atmosphere. Furthermore, large amounts of grease and oil stains often accumulate at the fume exhaust outlets, affecting aesthetics, fostering bacterial growth, and producing unpleasant odors. The fume ducts and exhaust outlets are typically located high up in buildings, making cleaning extremely difficult.
[0003] Oil fume purification equipment widely used in the catering industry typically employs the electrostatic purification principle. Its core function is to efficiently remove pollutants such as oil fume droplets, volatile organic compounds, and odors generated during cooking. When oil fumes flow through an ionizing electric field, the oil fume particles become charged through corona discharge, and some particles are adsorbed onto the collection plate of the ionizing electric field, thus achieving the purpose of purifying the oil fumes. However, in practical applications, it has been found that traditional electrostatic adsorption structures, which use hollow cylindrical chambers with filamentous cathodes, are prone to displacement or sagging after prolonged use, easily leading to instability in the electric field. Simultaneously, oil fume substances tend to accumulate on the inner walls of the hollow cylindrical chamber, making them difficult to remove. Over time, this reduces the efficiency of oil fume adsorption, significantly increasing the difficulty and cost of equipment use and maintenance. Utility Model Content
[0004] The purpose of this invention is to provide an electrode strip and an electrostatic adsorption type oil fume removal device to improve the removal efficiency of electrostatic adsorption kitchen oil fumes and ensure stability during long-term use.
[0005] To achieve the above objectives, the technical solution of this utility model is as follows: An electrode strip includes a long strip-shaped first electrode sheet and a second electrode sheet. The first electrode sheet and the second electrode sheet are stamped and cut from metal sheets of equal thickness. The first electrode sheet and the second electrode sheet are provided with a mortise and tenon structure that matches each other at the center line position. The two are spliced together by the mortise and tenon structure to form a cross-shaped integrated structure with the center line aligned. The first electrode plate and the second electrode plate are sequentially divided into an electrode part, a connecting part, and a mounting part. The electrode part has serrated electrode heads arranged at intervals on the outer side. The mounting part has a threaded structure with a regular pitch and is fitted with a nut. The connecting part has an outward expansion structure that mates with the inner side of the nut, which is used to restrict and fix the mounting electrode plate when the nut is tightened.
[0006] Furthermore, the first electrode sheet has a plurality of straight grooves evenly spaced in the middle, and an open groove at the front end of the first electrode sheet. The width of the straight grooves and the open groove is the same as the thickness of the second electrode sheet. The second electrode sheet has a through groove at the corresponding position of the adjacent straight groove of the first electrode sheet. When the first electrode sheet and the second electrode sheet are connected by this tenon and mortise structure, the structure of the open grooves, straight grooves and through grooves arranged in an alternating manner creates a tightly fitting integrated structure.
[0007] Furthermore, a continuous slit is provided at the center of the second electrode sheet, which connects all the through slots along its length, allowing the second electrode sheet to elastically open in the through slot area to accommodate the insertion of the first electrode sheet.
[0008] Furthermore, the second electrode sheet has a hook structure at one end of the through groove. The hook structure is formed by a slit cut and is used to clamp the end of the straight groove after the first electrode sheet is inserted to prevent the two from separating.
[0009] Furthermore, the front ends of the first electrode sheet are provided with one and three sawtooth structures respectively, and the front ends of the second electrode sheet are provided with two and four sawtooth structures respectively. When the first electrode sheet and the second electrode sheet are connected into a single structure by a tenon and mortise structure, a sawtooth arrangement structure with one, two, three, and four sawtooths is constructed in the clockwise direction.
[0010] Furthermore, the edge of the connection part away from the threaded structure is a rounded chamfer. This reduces the electric field concentration in the non-discharge area and avoids stray discharge interfering with the stability of the main electric field.
[0011] An electrostatic adsorption type oil fume removal device includes a housing and a honeycomb panel arranged inside the housing. The honeycomb panel has multiple square through-cell chambers arranged in a horizontal array, each rotating at 45 degrees. The honeycomb panel is made of aluminum alloy. Electrode strips are arranged at the center line of the chamber. From the front, the four corners of the cross structure of the electrode strips are aligned with the four inner corners of the square chamber. The front ends of all electrode strips are equidistant from the inner wall of the chamber. A grid-shaped metal electrode frame is provided at the outer end of the oil fume exhaust side of the honeycomb panel. The electrode frame has mounting holes arranged in a matrix, which are aligned with the center of the chamber. The mounting holes are used to accommodate the mounting parts of the electrode strips. The electrode strips are electrically secured to the electrode frame by nuts. The electrode frame is mounted and electrically fixed to the honeycomb plate through ceramic insulating components at its four corners. The electrode frame is connected to the negative terminal of the electrostatic generator through wires, and the honeycomb plate is connected to the positive terminal of the electrostatic generator through wires.
[0012] Furthermore, the electrostatic voltage generated by the electrostatic generator is 11.0-12.0KV.
[0013] Furthermore, an oil collection groove is arranged below the exhaust side of the honeycomb panel.
[0014] Furthermore, the front end of the honeycomb panel is provided with a wind collection hood, which guides the oil fumes into the interior of the honeycomb panel.
[0015] Compared with existing technologies, this solution has the following advantages: This solution provides an electrode strip, which consists of a first electrode plate and a second electrode plate joined together in a cross shape using a tenon and mortise structure. When arranged horizontally, it can maintain its structure for a long time without lateral or vertical deviation. It avoids the drooping phenomenon seen in electrode wire structures and the fatigue of springs due to prolonged tension. Therefore, this electrode strip can always maintain a precisely aligned arrangement inside the cavity, ensuring that the discharge serrations are always equidistant from the inner wall of the cavity. This results in a more balanced and durable adsorption electric field inside the cavity, greatly improving the stability and efficiency of electrostatic adsorption. The first and second electrode sheets in this solution can be made by stamping and cutting metal sheets, which has the characteristics of convenient processing, low cost, long service life and low maintenance cost, and is particularly suitable for long-term high-intensity kitchen fume adsorption. This solution uses a 1-4 serrated structure at the front end to prevent installation errors and improve yield when installing the first and second electrode plates. The rear end uses a threaded nut arrangement structure to fix the first and second electrode plates after installation, which can improve the overall stability of the electrode strip and ensure the accuracy of the placement position during long-term operation. Even when the fume removal device is affected by fan vibration, it can always maintain accurate fume adsorption operation. This electrostatic adsorption oil fume removal device features an array of square chambers arranged at the honeycomb panel. These 45-degree rotating chambers can collect oil stains descending from the side walls at the bottom and transfer them to the rear end of the honeycomb panel under the action of wind. Therefore, the oil path is reasonable, and the oil will not accumulate on the inner wall, making the internal electric field more balanced and reasonable. In this design, the electrode strips only need to be installed from one side (the exhaust side), achieving precise positioning within the honeycomb panel. Traditional electrode wire structures require installation and fixation from both ends, increasing installation, disassembly, and maintenance costs, and reducing the accuracy of the electric field. The electrostatic generator produces an electrostatic voltage of 11.0-12.0KV. The applicant, after extensive research, believes that too low a voltage will result in insufficient electric field strength, reducing the efficiency of oil fume adsorption; while too high a voltage will cause the oil fume to coke or carbonize, causing it to firmly adhere to the inner wall of the chamber, which will affect the adsorption operation over time. Therefore, this voltage range is an excellent design for the electrode strips and honeycomb panel structure in this solution, enabling the system to achieve its best performance. Thus, this solution provides a highly efficient and precise electrostatic oil fume adsorption solution, particularly suitable for high-intensity oil fume adsorption in scenarios such as industrial kitchens. Attached Figure Description
[0016] Figure 1 This is a structural layout diagram of the first and second electrode plates.
[0017] Figure 2 This is a schematic diagram of the second electrode sheet structure.
[0018] Figure 3 This is a schematic diagram of the structure when the second electrode sheet is properly opened.
[0019] Figure 4 This is a schematic diagram of the overall structure of the electrode strip.
[0020] Figure 5 This is a schematic diagram of the internal structure of the oil fume removal device.
[0021] Figure 6 This is a schematic diagram of the side structure of the oil fume removal device.
[0022] Figure 7 This is a schematic diagram of the installation structure of the electrode holder and electrode strips.
[0023] Figure 8 This is a schematic diagram of the installation structure of the honeycomb panel and electrode strips.
[0024] Figure 9 This is a schematic diagram of the front mounting structure of the honeycomb panel and electrode strips. Detailed Implementation
[0025] The initial goal of this solution is to provide a fume removal device with a simple and stable structure that can efficiently and persistently adsorb oil fumes, especially in scenarios with heavy oil fumes such as industrial kitchens.
[0026] refer to Figures 1 to 4 An electrode strip includes a long strip-shaped first electrode sheet 1 and a second electrode sheet 2. The first electrode sheet and the second electrode sheet are stamped and cut from metal sheets or silicon steel sheets of equal thickness. The first electrode sheet 1 and the second electrode sheet 2 are provided with a mortise and tenon structure that cooperates with each other at the center line position. The two can be spliced together by the mortise and tenon structure to form a long strip-shaped cross-shaped combination structure with the center line aligned.
[0027] Specifically, the thickness of the first electrode sheet and the second electrode sheet can be 0.5-1.2 mm. The first electrode sheet 1 has a plurality of straight grooves 11 evenly spaced in the middle. The front end of the first electrode sheet 1 has an open groove 12. The width of the straight grooves 11 and the open groove 12 is the same as the thickness of the second electrode sheet 2. The second electrode sheet 2 has a through groove 21 at the corresponding position of the adjacent straight grooves of the first electrode sheet 1. The front end of the through groove 21 is aligned with the rear end of the open groove 12. When the first electrode sheet 1 and the second electrode sheet 2 are connected by this mortise and tenon structure, they form a tightly fitted integrated structure by means of the interleaved and aligned structure of the open grooves 12, straight grooves 11 and through grooves 21.
[0028] To facilitate overall installation, a continuous narrow slit 23 is provided at the center of the second electrode plate 2, which connects all the through slots 21 along their length. Figure 2 As shown by the red line in the diagram, from the first through groove 21 to the rear end of the second electrode 2, the slit 23 and the through groove 21 divide the second electrode 2 into two parts (the front end of the second electrode 2, i.e., the part corresponding to the opening groove 12, is still an integral structure). Therefore, the second electrode 2 can be appropriately pried open along the through groove 21 and the slit 23, and the first electrode 1 can be embedded and arranged at the center line of the second electrode 2 through the opening groove 12 and the straight groove 11. To improve the stability of the mortise and tenon structure, the second electrode plate 2 has a hook 22 structure at one end of the through groove 21. The hook 22 structure is formed by a corresponding circumferential rotary cut through the slit 23. When the first electrode plate 1 is inserted and arranged at the center of the second electrode plate 2, the rear end of the straight groove 11 is sequentially inserted into the hook 22 from front to back, so that the first electrode plate 1 and the second electrode plate 2 form a stable and difficult-to-disassemble integrated structure, and a precise cross-shaped combination structure is constructed.
[0029] The first electrode plate 1 and the second electrode plate 2 are sequentially divided into an electrode part 31, a connecting part 32, and a mounting part 33. The outer side of the electrode part is provided with multiple serrated protrusions of electrode heads 34, and the spacing between adjacent electrode heads 34 is controlled between 10.0 and 15.0 mm to construct a stable electric field. The mounting part 33 has a threaded structure with a regular pitch and is fitted with a nut 35. The nut 35 can engage with the threads at the rear ends of the first electrode plate 1 and the second electrode plate 2. The connecting part has an outward expansion structure that engages with the inner side of the nut to achieve the function of fixed installation. At the same time, when the nut 35 is installed, it can precisely restrict the mounting part 33 and make the cross combination structure of the first electrode plate 1 and the second electrode plate 2 more stable.
[0030] In some embodiments, to improve the accuracy of assembly and prevent misalignment, the front ends of the first electrode plate 1 and the second electrode plate 2 are provided with multiple serrated protrusions. The front ends of the first electrode plate 1 are provided with one and three serrated structures on each side, respectively, and the front ends of the second electrode plate 2 are provided with two and four serrated structures on each side, respectively. Therefore, when the first electrode plate 1 and the second electrode plate 2 are connected into a single structure by a tenon and mortise structure, a serrated structure with one, two, three, and four serrated teeth is constructed in the clockwise direction. This arrangement structure also ensures that the threads of the mounting part 33 at the rear end are precisely aligned.
[0031] To reduce the interference of the connection part on the electric field, the edge of the connection part 32 away from the threaded structure is an arc-shaped chamfer structure. This arc structure can reduce the discharge of the spike structure at this point, thereby ensuring stable discharge and electric field effect at the electrode head 34.
[0032] refer to Figures 5 to 9 This solution also includes an electrostatic adsorption type oil fume removal device, including a housing and a honeycomb panel 42 arranged inside the housing. The honeycomb panel 42 has multiple square through-type chambers 43 arranged in a horizontal array, rotating at 45 degrees. The honeycomb panel 42 is made of conductive aluminum alloy. The inner wall of the chamber 43 is smooth and regular. An electrode strip is arranged at the center line of the chamber 43. From the front, the four corners of the cross structure of the electrode strip are aligned with the four inner corners of the square of the chamber. The front ends of all electrode heads 34 are equidistant from the inner wall of the chamber. A grid-shaped metal electrode frame 44 is provided at the outer end of the oil fume exhaust side of the honeycomb panel 42. The electrode frame 44 has mounting holes 45 arranged in a matrix. The mounting holes 45 are arranged in a center-aligned manner with the corresponding chambers 43. The mounting holes 45 can accommodate the mounting part 33 of the electrode strip. The electrode strip is electrically installed and fastened at the electrode frame 44 by nuts 35. The electrode frame 44 is mounted and electrically fixed to the honeycomb panel 42 through the ceramic insulating parts 46 at its four corners. The electrode frame 44 is connected to the negative terminal of the electrostatic generator through wires, and the honeycomb panel is connected to the positive terminal of the electrostatic generator through wires. In order to build a stable electric field inside the chamber 43, the electrostatic voltage generated by the electrostatic generator is controlled between 11.0-12.0KV.
[0033] An oil collection trough 47 is arranged below the exhaust side of the honeycomb panel 42. In some embodiments, a detachable collection tank can be connected below the oil collection trough 47 for collecting and treating electrostatically adsorbed oil fumes. A wind hood 48 is provided at the front end of the honeycomb panel 42, which completely guides the oil fumes into the interior of each chamber 43 of the honeycomb panel.
[0034] In actual use, the oil fumes are transported to the air collection hood of the oil fume removal device by the centrifugal fan at the front or rear. There, they are sent into each chamber 43. Inside the chamber 43, the electrode heads 34 of the electrode strips, under the action of voltage and current from the electrostatic generator, construct a stable and efficient electric field, causing the oil fume particles to carry negative charges. Attracted by the positive charges on the inner wall of the chamber 43, the oil fume particles are collected to the inner wall of the chamber 43. The accumulated oil fume material descends under the action of gravity and is collected to the bottom of the chamber 43. Under the action of wind, it is transferred to the exhaust side and finally collected in the oil collection tank 47, thus achieving efficient oil fume removal.
[0035] In summary, this electrode strip, constructed by joining a first electrode plate and a second electrode plate in a cross-shaped integrated structure using a tenon-and-mortise joint, can maintain its structure for a long time when horizontally arranged, without lateral or vertical deviation. It avoids the drooping phenomenon seen in electrode wire structures and the fatigue caused by prolonged spring tension. Therefore, this electrode strip maintains precise alignment within the cavity, ensuring that the discharge serrations remain equidistant from the inner wall of the cavity. This results in a more balanced and durable adsorption electric field within the cavity, significantly improving the stability and efficiency of electrostatic adsorption. The first and second electrode sheets in this solution can be made by stamping and cutting metal sheets, which has the characteristics of convenient processing, low cost, long service life and low maintenance cost, and is particularly suitable for long-term high-intensity kitchen fume adsorption. This solution uses a 1-4 serrated structure at the front end to prevent installation errors and improve yield when installing the first and second electrode plates. The rear end uses a threaded nut arrangement structure to fix the first and second electrode plates after installation, which can improve the overall stability of the electrode strip and ensure the accuracy of the placement position during long-term operation. Even when the fume removal device is affected by fan vibration, it can always maintain accurate fume adsorption operation. This electrostatic adsorption oil fume removal device features an array of square chambers arranged at the honeycomb panel. These 45-degree rotating chambers can collect oil stains descending from the side walls at the bottom and transfer them to the rear end of the honeycomb panel under the action of wind. Therefore, the oil path is reasonable, and the oil will not accumulate on the inner wall, making the internal electric field more balanced and reasonable. The electrostatic generator produces an electrostatic voltage of 11.0-12.0KV. The applicant has conducted extensive research and believes that if the voltage is too low, the electric field strength will be insufficient, reducing the oil fume adsorption efficiency. If the voltage is too high, the oil fume will coke and accumulate on the inner wall of the chamber, which will affect the adsorption operation over a long period of time. Therefore, this solution provides a highly efficient and precise electrostatic oil fume adsorption solution, which is particularly suitable for high-efficiency oil fume adsorption in scenarios with heavy oil fumes, such as industrial kitchens.
Claims
1. An electrode strip, characterized by: It includes a long strip-shaped first electrode sheet and a second electrode sheet, which are made of metal sheets of equal thickness by stamping and cutting. The first electrode sheet and the second electrode sheet have a mortise and tenon structure that matches each other at the center line position. The two are spliced together by the mortise and tenon structure to form a cross-shaped integrated structure with the center line aligned. The first electrode plate and the second electrode plate are sequentially divided into an electrode part, a connecting part, and a mounting part. The electrode part has serrated electrode heads arranged at intervals on the outer side. The mounting part has a threaded structure with a regular pitch and is fitted with a nut. The connecting part has an outward expansion structure that mates with the inner side of the nut, which is used to restrict and fix the mounting electrode plate when the nut is tightened.
2. An electrode strip according to claim 1, characterized in that: The first electrode sheet has a plurality of straight grooves evenly spaced in the middle, and an open groove at the front end of the first electrode sheet. The width of the straight grooves and the open groove is the same as the thickness of the second electrode sheet. The second electrode sheet has a through groove at the corresponding position of the adjacent straight groove of the first electrode sheet. When the first electrode sheet and the second electrode sheet are connected by this tenon and mortise structure, the structure of the open grooves, straight grooves and through grooves arranged in an alternating manner creates a tightly fitted integrated structure.
3. An electrode strip according to claim 2, characterised in that: The second electrode has a continuous slit at its center, which connects all the through slots along its length, allowing the second electrode to elastically open in the through slot area to accommodate the insertion of the first electrode.
4. An electrode strip according to claim 3, characterised in that: The second electrode sheet has a hook structure at one end of the through groove, which is formed by cutting around a slit.
5. An electrode strip according to claim 1, characterized in that: The front ends of the first electrode plate have one and three sawtooth structures on each side, and the front ends of the second electrode plate have two and four sawtooth structures on each side. When the first electrode plate and the second electrode plate are connected into a single structure by a tenon and mortise structure, a sawtooth arrangement structure with one, two, three, and four sawtooths is constructed in a clockwise direction.
6. An electrode strip according to claim 1, characterized in that: The edge of the connecting part away from the threaded structure has an arc-shaped chamfer.
7. The electrostatic precipitator according to claim 1, wherein: The device includes a housing and a honeycomb panel arranged inside the housing. The honeycomb panel has multiple square through-cells arranged in a horizontal array, each rotating at 45 degrees. The honeycomb panel is made of aluminum alloy. An electrode strip as described in any one of claims 1 to 6 is arranged at the center line of the cavity. From the front, the four corners of the cross structure of the electrode strip are aligned with the four interior corners of the square of the cavity. The front ends of all the electrode strips are equidistant from the inner wall of the cavity. A grid-shaped metal electrode frame is provided at the outer end of the oil fume exhaust side of the honeycomb panel. The electrode frame has mounting holes arranged in a matrix. The mounting holes are arranged in a center-aligned manner with the cavity. The mounting holes are used to accommodate the mounting parts of the electrode strips. The electrode strips are electrically secured to the electrode frame by nuts. The electrode frame is mounted and electrically fixed to the honeycomb plate through ceramic insulating components at its four corners. The electrode frame is connected to the negative terminal of the electrostatic generator through wires, and the honeycomb plate is connected to the positive terminal of the electrostatic generator through wires.
8. The electrostatic adsorption type cooking fume removing device according to claim 7, characterized in that: The electrostatic voltage generated by the electrostatic generator is 11.0-12.0KV.
9. The electrostatic precipitator according to claim 7, wherein: An oil collection groove is arranged below the honeycomb panel on the exhaust side.
10. The electrostatic adsorption type cooking fume removing device according to claim 7, characterized in that: The front end of the honeycomb panel is provided with a wind collection hood, which guides the oil fumes into the interior of the honeycomb panel.