Electrical purification module and device having the same
By designing multiple rows of staggered discharge electrodes in the electric purification module, the problem of low purification efficiency in the prior art is solved, and a more efficient air purification effect and a larger circulation air volume are achieved.
Patent Information
- Application Number
- CN202421467589.1
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-06-25
- Publication Date
- 2025-03-28
- Estimated Expiration
- 2034-06-25
AI Technical Summary
The purification efficiency of existing electrical purification modules is low because the plasma is quickly taken away by the airflow and the plasma and polluted air contact time is short.
An electric purification module is designed, in which a plurality of rows are provided in a direction parallel to the direction of the air flow, the plane where each row of discharge electrodes is located is perpendicular to the direction of the air flow, and any adjacent two rows of discharge electrodes are arranged interlaced.
By increasing the number of discharge electrodes and interleaving settings, the plasma diffusion range is improved, making the polluted air and plasma contact greater chances, and the purification effect is better. At the same time, the air resistance of the electric purification module is reduced and the circulation air volume of the entire machine is increased.
Smart Images
Figure CN222688380U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the technical field of air purification, in particular to an electric purification module and a device with the electric purification module. Background Art
[0002] In the related art, some air purifiers are equipped with an electric purification module, which includes multiple cylindrical discharge electrodes. The cylindrical discharge electrodes serve as the source of plasma release, and utilize the collision of electrons and ions in the plasma with gas molecules in the air to produce a chain chemical reaction, so that pollutants in the gas migrate, transform and become harmless, thereby removing gaseous pollutants. In order not to affect the overall circulation air volume of the air purifier, the wind resistance of the electric purification module should not be too large, so there will be a certain limit on the number of discharge electrodes, which will cause the plasma generated inside the electric purification module to be quickly carried away by the airflow, and the plasma will be in contact with the polluted air for a long time, so the ability to remove gaseous pollutants is not strong, and the purification efficiency is low. Utility Model Content
[0003] In view of this, the utility model provides an electric purification module and a device having the electric purification module to solve the problem of low purification efficiency of the electric purification module in the related art.
[0004] In a first aspect, the utility model provides an electric purification module, including discharge electrodes, wherein the discharge electrodes are arranged in multiple rows in a direction parallel to the airflow direction, the plane where each discharge electrode is located is perpendicular to the airflow direction, and any two adjacent discharge electrodes are staggered.
[0005] Beneficial effect: By arranging multiple rows of discharge electrodes in a direction parallel to the airflow direction, the plane where each discharge electrode is located is perpendicular to the airflow direction, and any two adjacent rows of discharge electrodes are staggered, the plasma diffusion range around the discharge electrodes can be improved, so that the passing polluted air has a greater chance of contacting the plasma, the purification effect is better, and the wind resistance of the electric purification module can be reduced, which is beneficial to increasing the circulating air volume of the whole machine.
[0006] Compared with related technologies, under the premise that the total number of discharge electrodes remains unchanged, the plasma diffusion range around the discharge electrodes can be improved, so that the overflowing polluted air has a greater chance of contacting the plasma and the purification effect is better.
[0007] In an optional embodiment, in a direction parallel to the flow direction of the airflow, the distance between two adjacent rows of electrodes is L1, 6.5 mm ≤ L1 ≤ 10 mm.
[0008] Beneficial effect: By ensuring that the distance between two adjacent rows of electrodes is between 6.5 mm and 10 mm in a direction parallel to the airflow direction, the distance will not be too close, which can prevent the two rows of electrodes from being too close, resulting in plasma accumulation around the electrodes and creating a risk of ignition. At the same time, the distance will not be too far, which can prevent the waste of internal space of the electric purification module and the increase of the volume of the electric purification module.
[0009] In an optional implementation, the distance between two adjacent discharge electrodes in the same row is L2, 10 mm ≤ L2 ≤ 20 mm.
[0010] Beneficial effect: By making the distance between two adjacent discharge electrodes in the same row between 10 mm and 20 mm, the distance will not be too close, which can prevent the risk of ignition caused by plasma accumulation around the electrodes due to the small spacing between the electrodes in the same row.
[0011] In an optional embodiment, in a direction perpendicular to the airflow direction, the distance between one discharge electrode in any row and an adjacent discharge electrode in an adjacent row is L3, and L3 is half of L2.
[0012] Beneficial effect: In the direction perpendicular to the airflow direction, the distance between one discharge electrode in any row and the adjacent discharge electrode in the adjacent row is half the distance between two adjacent discharge electrodes in the same row. On the one hand, it is convenient to determine the position of the discharge electrode, and on the other hand, it can make the arrangement of the discharge electrodes more uniform, thereby improving the purification efficiency.
[0013] In an optional implementation, the number of rows of the discharge electrodes is greater than or equal to 4.
[0014] Beneficial effect: by making the number of rows of discharge electrodes greater than or equal to 4, and staggering any two adjacent rows of discharge electrodes, under the premise that the total number of discharge electrodes is the same, compared with the related art in which the discharge electrodes are arranged in two rows and the positions of the two rows of discharge electrodes are the same, the number of discharge electrodes in each row is reduced, thereby reducing wind resistance and helping to increase the circulating air volume of the whole machine; the plasma diffusion range around the discharge electrodes can be increased, so that the passing polluted air has a greater chance of contacting the plasma and the purification effect is better.
[0015] In an optional embodiment, each discharge electrode row includes at least two discharge electrodes.
[0016] Beneficial effect: Each discharge electrode row includes at least two discharge electrodes, so that the overflowing polluted air has a greater chance of contacting with the plasma and the purification effect is better.
[0017] In an optional embodiment, the electrical purification module further comprises a grille, and in the airflow direction, the grille is arranged downstream of the multiple rows of discharge electrodes.
[0018] Beneficial effect: By arranging a grid downstream of the discharge electrode, the residence time of the plasma in the electrical purification module can be further increased, so that it can be in contact with the flowing polluted air for as long as possible, thereby improving the purification efficiency.
[0019] In an optional embodiment, the grille includes a plurality of ribs arranged at intervals, an air hole is formed between two adjacent ribs, and a distance between two adjacent ribs is L4, 7mm≤L4≤10mm.
[0020] Beneficial effect: The distance between two adjacent ribs is between 7 mm and 10 mm, which can ensure that the airflow can pass through the grille smoothly and reduce wind resistance.
[0021] In an optional embodiment, the grid includes a windward side close to the discharge electrode and a leeward side away from the discharge electrode, and the width of the ribs at the windward side is smaller than the width at the leeward side.
[0022] Beneficial effect: By making the width of the ribs on the windward side smaller than that on the leeward side, the contact time between plasma and polluted air can be prolonged and local losses can be reduced, so that the air volume of the whole machine is not too low.
[0023] In an optional embodiment, the grille includes a windward side close to the discharge electrode and a leeward side away from the discharge electrode, and the distance between the windward side and a discharge electrode closest to the windward side in a direction parallel to the airflow direction is L5, and L5≥10mm.
[0024] Beneficial effect: The distance between the windward side of the grille and a discharge electrode closest to the windward side in a direction parallel to the airflow direction is greater than or equal to 10 mm, which can ensure that the existence of the grille will not affect the normal discharge of the discharge electrode, so that the discharge electrode can fully generate plasma.
[0025] In an optional embodiment, the electric purification module further includes a shell having an air inlet end and an air outlet end, and the discharge electrode is disposed in the shell.
[0026] Beneficial effect: By setting up a shell, the shell has an air inlet end and an air outlet end, which can ensure that the airflow enters the shell from the air inlet end, passes around the discharge electrode, and flows out from the air outlet end after purification, thereby ensuring purification efficiency.
[0027] In an optional implementation, the discharge electrode includes a central electrode, an insulating layer surrounding the central electrode, and an outer electrode spirally wound on the insulating layer.
[0028] Beneficial effect: The insulating layer is arranged between the central electrode and the outer electrode. The central electrode is connected to AC high voltage and the outer electrode is grounded. A dielectric barrier discharge can be formed to generate plasma. The electrical purification module does not need to be additionally provided with a grounding electrode, which can improve space utilization.
[0029] In a second aspect, the utility model further provides a device having an electric purification module, comprising:
[0030] The electrical purification module.
[0031] Beneficial effects: Since the electric purification module includes discharge electrodes, the discharge electrodes are arranged in multiple rows in a direction parallel to the airflow direction, the plane where each discharge electrode is located is perpendicular to the airflow direction, and any two adjacent rows of discharge electrodes are staggered, which can increase the plasma diffusion range around the discharge electrodes, so that the passing polluted air has a greater chance of contacting the plasma, the purification effect is better, and the wind resistance of the electric purification module can be reduced, which is beneficial to increasing the circulating air volume of the whole machine. BRIEF DESCRIPTION OF THE DRAWINGS
[0032] In order to more clearly illustrate the specific implementation methods of the utility model or the technical solutions in the prior art, the drawings required for use in the specific implementation methods or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are some implementation methods of the utility model. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.
[0033] Figure 1 It is a structural schematic diagram of an electric purification module in the related art;
[0034] Figure 2 It is a top view of an electric purification module in the related art;
[0035] Figure 3 This is a schematic diagram of the structure of an electric purification module according to an embodiment of the utility model;
[0036] Figure 4 A top view of an electric purification module according to an embodiment of the utility model;
[0037] Figure 5 This is a schematic diagram of the structure of an electric purification module according to an embodiment of the utility model when a grille is provided;
[0038] Figure 6 A top view of an electric purification module according to an embodiment of the utility model when a grille is provided;
[0039] Figure 7 For Figure 1 The ozone mole fraction distribution diagram when the electric purification module performs multiphase flow simulation;
[0040] Figure 8 For Figure 3 The ozone mole fraction distribution diagram when the electric purification module performs multiphase flow simulation;
[0041] Fig. 9 For Figure 5 The ozone mole fraction distribution diagram when the electric purification module performs multiphase flow simulation.
[0042] Description of reference numerals:
[0043] 1. discharge electrode; 2. ribs; 3. shell; 301. air inlet; 302. air outlet. DETAILED DESCRIPTION
[0044] In order to make the purpose, technical solution and advantages of the embodiment of the utility model clearer, the technical solution in the embodiment of the utility model will be clearly and completely described below in conjunction with the drawings in the embodiment of the utility model. Obviously, the described embodiment is a part of the embodiment of the utility model, not all the embodiments. Based on the embodiment of the utility model, all other embodiments obtained by those skilled in the art without creative work are within the scope of protection of the utility model.
[0045] In the related art, some air purifiers are equipped with an electric purification module, which includes multiple cylindrical discharge electrodes. The cylindrical discharge electrodes serve as the source of plasma release, and utilize the collision of electrons and ions in the plasma with gas molecules in the air to produce a chain chemical reaction, so that pollutants in the gas migrate, transform and become harmless, thereby removing gaseous pollutants. In order not to affect the overall circulation air volume of the air purifier, the wind resistance of the electric purification module should not be too large, so there will be a certain limit on the number of discharge electrodes, which will cause the plasma generated inside the electric purification module to be quickly carried away by the airflow, and the plasma will be in contact with the polluted air for a long time, so the ability to remove gaseous pollutants is not strong, and the purification efficiency is low.
[0046] Combine the following Figures 1 to 8 , describing an embodiment of the utility model.
[0047] According to an embodiment of the utility model, on the one hand, an electric purification module is provided, including discharge electrodes 1, wherein the discharge electrodes 1 are arranged in multiple rows in a direction parallel to the flow direction of the airflow, wherein the plane where each discharge electrode 1 is located is perpendicular to the flow direction of the airflow, and any two adjacent discharge electrodes 1 are staggered.
[0048] In this embodiment, by providing multiple rows of discharge electrodes 1 in a direction parallel to the airflow direction, the plane where each discharge electrode 1 is located is perpendicular to the airflow direction, and any two adjacent rows of discharge electrodes 1 are staggered, the plasma diffusion range around the discharge electrode 1 can be improved, so that the passing polluted air has a greater chance of contacting the plasma, the purification effect is better, and the wind resistance of the electric purification module can be reduced, which is beneficial to increasing the circulating air volume of the whole machine.
[0049] Compared with the related art, under the premise that the total number of discharge electrodes 1 remains unchanged, the plasma diffusion range around the discharge electrode 1 can be increased, so that the overflowing polluted air has a greater chance of contacting the plasma and the purification effect is better.
[0050] It should be noted that if Figure 2 , Figure 4 and Figure 6 As shown, the discharge electrodes 1 distributed on the same vertical line are a discharge electrode 1, and the plane where each discharge electrode 1 is located is perpendicular to the flow direction of the airflow.
[0051] Specifically, under the premise that the total number of discharge electrodes 1 remains unchanged, a comparison is made by taking the case where the discharge electrodes 1 are distributed into two rows, and the arrangement positions of the discharge electrodes 1 in the two rows are consistent (referred to as sequential arrangement), and the case where the discharge electrodes 1 are distributed into four rows, and any two rows of discharge electrodes 1 are staggered (referred to as crossed arrangement). Since the discharge electrodes 1 are distributed into four rows, the number of discharge electrodes 1 in each row is reduced, and thus the wind resistance can be reduced, which is beneficial to increasing the circulating air volume of the whole machine; since the discharge electrodes 1 are distributed into four rows, the plasma diffusion range around the discharge electrodes 1 can be increased, so that the overflowing polluted air has a greater chance of contacting with the plasma, and the purification effect is better.
[0052] In one embodiment, in a direction parallel to the flow direction of the airflow, the distance between two adjacent discharge electrodes 1 is L1, and 6.5 mm ≤ L1 ≤ 10 mm.
[0053] In this embodiment, by making the distance between two adjacent rows of electric electrodes 1 in a direction parallel to the airflow direction between 6.5 mm and 10 mm, the distance will not be too close, which can prevent the two rows of electrodes from being too close to cause plasma accumulation around the electrodes to create a risk of ignition. At the same time, the distance will not be too far, which can prevent the waste of internal space of the electric purification module and the increase of the volume of the electric purification module.
[0054] Specifically in one embodiment, in a direction parallel to the flow direction of the airflow, the distance between two adjacent rows of electrodes 1 is 6.5 mm.
[0055] Specifically in one embodiment, in a direction parallel to the flow direction of the airflow, the distance between two adjacent rows of electrodes 1 is 8 mm.
[0056] Specifically in one embodiment, in a direction parallel to the flow direction of the airflow, the distance between two adjacent rows of electrodes 1 is 10 mm.
[0057] In one embodiment, the distance between two adjacent discharge electrodes 1 in the same row is L2, and 10 mm ≤ L2 ≤ 20 mm.
[0058] In this embodiment, by making the distance between two adjacent discharge electrodes 1 in the same row between 10 mm and 20 mm, the distance will not be too close, which can prevent the risk of ignition caused by plasma accumulation around the electrodes due to the small distance between the electrodes in the same row.
[0059] At the same time, by making the distance between two adjacent discharge electrodes 1 in the same row between 10mm and 20mm, and the distance between two adjacent discharge electrodes 1 in a direction parallel to the airflow direction between 6.5mm and 10mm, the distance between any two adjacent discharge electrodes 1 can be made not too small, thereby preventing the same discharge electrode 1 from having too small a distance, resulting in plasma accumulation around the electrode and causing a risk of ignition. The discharge electrodes 1 inside the entire electric purification module are reasonably arranged, which can reduce wind resistance and help increase the circulating air volume of the whole machine, and can also increase the plasma diffusion range around the discharge electrode 1, so that the over-flowing polluted air has a greater chance of contacting the plasma and the purification effect is better.
[0060] Specifically in one embodiment, the distance between two adjacent discharge electrodes 1 in the same row is 10 mm.
[0061] Specifically in one embodiment, the distance between two adjacent discharge electrodes 1 in the same row is 15 mm.
[0062] Specifically in one embodiment, the distance between two adjacent discharge electrodes 1 in the same row is 20 mm.
[0063] Specifically in one embodiment, in a direction parallel to the airflow direction, the distance between two adjacent discharge electrodes 1 in the same row is 6.5 mm, and at the same time, the distance between two adjacent discharge electrodes 1 in the same row is 10 mm.
[0064] Specifically in one embodiment, in a direction parallel to the airflow direction, the distance between two adjacent discharge electrodes 1 in the same row is 8 mm, and at the same time, the distance between two adjacent discharge electrodes 1 in the same row is 15 mm.
[0065] Specifically in one embodiment, in a direction parallel to the airflow direction, the distance between two adjacent discharge electrodes 1 in the same row is 10 mm, and at the same time, the distance between two adjacent discharge electrodes 1 in the same row is 20 mm.
[0066] In one embodiment, in a direction perpendicular to the airflow direction, the distance between one discharge electrode 1 in any row and the adjacent discharge electrode 1 in the adjacent row is L3, and L3 is half of L2.
[0067] In this embodiment, in the direction perpendicular to the airflow direction, the distance between one discharge electrode 1 in any row and the adjacent discharge electrode 1 in the adjacent row is half the distance between two adjacent discharge electrodes 1 in the same row. On the one hand, it is convenient to determine the position of the discharge electrode 1, and on the other hand, the discharge electrodes 1 can be arranged more evenly, which can improve the purification efficiency.
[0068] Specifically in one embodiment, Figures 3 to 6 As shown, from left to right, four rows of discharge electrodes 1 are arranged, and the uppermost discharge electrode 1 in the second row is located on a symmetric plane between the two discharge electrodes 1 in the first row.
[0069] In one embodiment, the number of rows of discharge electrodes 1 is greater than or equal to four.
[0070] In this embodiment, the number of rows of discharge electrodes 1 is greater than or equal to 4, and any two adjacent rows of discharge electrodes 1 are staggered (referred to as staggered rows). Under the premise that the total number of discharge electrodes 1 is the same, compared with the related art in which two rows of discharge electrodes 1 are provided and the arrangement positions of the two rows of discharge electrodes 1 are consistent (referred to as sequential rows), the number of discharge electrodes 1 in each row is reduced, thereby reducing wind resistance, which is beneficial to increasing the circulating air volume of the whole machine; the plasma diffusion range around the discharge electrode 1 can be increased, so that the passing polluted air has a greater chance of contacting the plasma and the purification effect is better.
[0071] Specifically in one embodiment, the discharge electrodes 1 are arranged in four rows.
[0072] In this embodiment, by arranging four rows of discharge electrodes 1, and staggering any two adjacent rows of discharge electrodes 1 (referred to as staggered rows), under the premise that the total number of discharge electrodes 1 is the same, compared with the related art in which the discharge electrodes 1 are arranged in two rows and the two rows of discharge electrodes 1 are arranged in the same position (referred to as straight rows), the number of discharge electrodes 1 in each row is reduced, thereby reducing wind resistance, which is beneficial to increasing the circulating air volume of the whole machine; the plasma diffusion range around the discharge electrode 1 can be increased, so that the passing polluted air has a greater chance of contacting with the plasma, and the purification effect is better.
[0073] Of course, when the volume of the electric purification module is relatively large, the number of rows of discharge electrodes 1 can be greater.
[0074] In one embodiment, each discharge electrode row 1 includes at least two discharge electrodes 1 .
[0075] In this embodiment, each discharge electrode 1 includes at least two discharge electrodes 1, so that the overflowing polluted air has a greater chance of contacting with the plasma and the purification effect is better.
[0076] In one embodiment, each discharge electrode 1 includes two discharge electrodes 1 .
[0077] In this embodiment, each row of discharge electrodes 1 is provided with only two discharge electrodes 1, which is a small number. Therefore, it can be ensured that there is a barrier distance between the two discharge electrodes 1 in the same row, which can prevent the risk of ignition caused by the accumulation of plasma around the electrodes due to the small spacing between the electrodes in the same row. At the same time, the wind resistance can be reduced, which is beneficial to improving the circulating air volume of the whole machine.
[0078] Of course, when the volume of the electric purification module is relatively large, each discharge electrode 1 may include more discharge electrodes.
[0079] Specifically in one embodiment, Figure 3 and Figure 4 As shown, the total number of discharge electrodes 1 is eight, and the discharge electrodes 1 are arranged in four rows, with two electrodes in each row, and any two adjacent rows of discharge electrodes 1 are staggered (referred to as staggered).
[0080] like Figure 1 and Figure 2 As shown, the number of electrodes in the related art is eight in total, and two rows are arranged in a direction parallel to the airflow direction. Each row is provided with four discharge electrodes 1, and the arrangement positions of the discharge electrodes 1 in each row are consistent (referred to as sequential arrangement).
[0081] Respectively Figure 1 and Figure 2 The corresponding discharge electrodes 1 are arranged in a row and the electric purification module Figure 3 and Figure 4 The corresponding discharge electrode 1 cross-arranged electric purification module is subjected to multiphase flow simulation. The ozone equivalent plasma is used, and the peripheral surface of the discharge electrode 1 is used as the ozone release inlet. The mass flow rate of the ozone inlet of a single discharge electrode 1 is 5.22e-11kg / s. At the same time, the flow velocity is fixed at 0.5m / s. The ozone mole fraction distribution diagram of the same cross section in the height direction of the two schemes is obtained, as shown in FIG. Figure 7 and Figure 8 As shown, Figure 6 The ozone mole fraction distribution diagram of the electric purification module with discharge electrodes 1 arranged in series is shown in FIG. Figure 7 The ozone mole fraction distribution diagram of the electric purification module with the discharge electrodes 1 arranged in a staggered pattern is shown in Figure 1. Figure 7 and Figure 8 By comparison, it can be seen that the plasma diffusion range around the discharge electrode 1 of the staggered scheme is significantly larger than that of the straight-line scheme, which makes the contact between the flowing polluted air and the plasma greater and the purification effect better.
[0082] The ozone mole fraction distribution and the inlet and outlet pressure difference (the pressure difference between the air inlet end 301 and the air outlet end 302 ) of the same cross section of the two schemes are compared, as shown in Table 1.
[0083] Table 1
[0084]
[0085]
[0086] From Table 1, we can see that for the same number of discharge electrodes 1, the plasma mole fraction of the staggered scheme is increased by 198% compared with the straight scheme, and the wind resistance of the electric purification module is reduced by 5%. Therefore, the staggered scheme is not only beneficial to increasing the air volume of the whole machine, but also beneficial to improving the plasma purification capability.
[0087] In one embodiment, the electric purification module further comprises a grille, which is arranged downstream of the multi-discharge electric electrode 1 in the air flow direction.
[0088] In this embodiment, by providing a grid downstream of the discharge electrode 1, the residence time of the plasma in the electrical purification module can be further increased, so that it can be in contact with the flowing polluted air for as long as possible, thereby improving the purification efficiency.
[0089] After adding the grid, the multiphase flow simulation of the electric purification module is carried out. Using ozone equivalent plasma, the peripheral surface of the discharge electrode 1 is used as the ozone release inlet, so that the mass flow rate of the ozone inlet of a single discharge electrode 1 is 5.22e-11kg / s, and the flow velocity is fixed at 0.5m / s. Fig. 9 As shown, the ozone mole fraction distribution diagram of the cross section at the same height is obtained. Fig. 9 The ozone mole fraction in the cross section at the same height is obtained, as shown in Table 2. It can be seen that the plasma concentration distribution increases by 113% compared with the unblocked grid cross-row scheme.
[0090] plan Average mole fraction of ozone in the same cross section% Add grille 0.192304
[0091] In one embodiment, the grille includes a plurality of ribs 2 arranged at intervals, and air holes are formed between two adjacent ribs 2. The distance between two adjacent ribs 2 is L4, and 7mm≤L4≤10mm.
[0092] In this embodiment, the distance between two adjacent ribs 2 is between 7 mm and 10 mm, which can ensure that the airflow can pass through the grille smoothly and reduce wind resistance.
[0093] Specifically in one embodiment, the distance between two adjacent ribs 2 is 7 mm.
[0094] Specifically in one embodiment, the distance between two adjacent ribs 2 is 8 mm.
[0095] Specifically in one embodiment, the distance between two adjacent ribs 2 is 10 mm.
[0096] In one embodiment, the grid includes a windward side close to the discharge electrode 1 and a leeward side away from the discharge electrode 1 , and the width of the ribs 2 at the windward side is smaller than that at the leeward side.
[0097] In this embodiment, by making the width of the rib 2 on the windward side smaller than that on the leeward side, it can not only extend the contact time between the plasma and the polluted air, but also reduce local losses so that the air volume of the whole machine is not too low.
[0098] Specifically in one embodiment, Figure 5 and Figure 6 As shown, the windward side and the leeward side of the rib 2 are connected via an inclined surface.
[0099] In one embodiment, the grid includes a windward side close to the discharge electrode 1 and a leeward side away from the discharge electrode 1 , and the distance between the windward side and a discharge electrode 1 closest to the windward side in a direction parallel to the airflow direction is L5, and L5≥10mm.
[0100] In this embodiment, the distance between the windward side of the grille and a discharge electrode 1 closest to the windward side in a direction parallel to the airflow direction is greater than or equal to 10 mm, which can ensure that the existence of the grille will not affect the normal discharge of the discharge electrode 1, so that the discharge electrode 1 can fully generate plasma.
[0101] Specifically in one embodiment, the distance between the windward side of the grille and a discharge electrode 1 closest to the windward side in a direction parallel to the flow direction of the airflow is equal to 10 mm.
[0102] Specifically in one embodiment, the distance between the windward side of the grille and an electrode 1 closest to the windward side in a direction parallel to the flow direction of the airflow is equal to 15 mm.
[0103] In one embodiment, the electric purification module further includes a shell 3 , the shell 3 has an air inlet end 301 and an air outlet end 302 , and the discharge electrode 1 is disposed in the shell 3 .
[0104] In this embodiment, by setting up a shell 3, the shell 3 has an air inlet end 301 and an air outlet end 302, which can ensure that the airflow enters the shell 3 from the air inlet end 301, passes around the discharge electrode 1, and flows out from the air outlet end 302 after purification, thereby ensuring purification efficiency.
[0105] Specifically in one embodiment, Figure 3 and Figure 5 As shown, the housing 3 is in the shape of a cuboid.
[0106] Specifically in one embodiment, the grille is disposed inside the housing 3 .
[0107] Specifically in one embodiment, Figure 4 and Figure 6 As shown, the discharge electrode 1 is cylindrical.
[0108] In one embodiment, the discharge electrode 1 includes a central electrode, an insulating layer surrounding the central electrode, and an outer electrode spirally wound on the insulating layer.
[0109] In this embodiment, an insulating layer is arranged between the central electrode and the outer electrode. The central electrode is connected to AC high voltage and the outer electrode is grounded, so that a dielectric barrier discharge can be formed to generate plasma. The electrical purification module does not need to be additionally provided with a grounding electrode, which can improve space utilization.
[0110] Specifically in one embodiment, the outer electrode is a carbon fiber electrode.
[0111] Carbon fiber is a semiconductor material. Compared with general metals, the electron escape ability of carbon fiber per unit volume (or unit surface area) is relatively weak. Therefore, the number of electrons released can be effectively controlled during the discharge process, thereby preventing the discharge from being too intense. In addition, since a single filament of carbon fiber has an extremely small radius of curvature (its single filament diameter is only 7-10 μm). Under this condition, the actual discharge space around the carbon fiber electrode is limited to a smaller size, so that micro-discharge can be formed. In micro-discharges under higher electric field strengths, the field emission effect of the carbon fiber electrode 12 becomes non-negligible. Under the strong field emission effect, the discharge space is filled with a large number of seed electrons. The appearance of these seed electrons, on the one hand, as the initial electron source of other electron avalanches, effectively reduces the starting discharge voltage, making the discharge easy to achieve under relatively low average field strengths; on the other hand, the generation of electrons under a lower average electric field is conducive to obtaining slow-growing electrons, which provides the possibility of achieving stable glow discharge under atmospheric pressure and inhibits its transformation into filamentary discharge.
[0112] According to an embodiment of the present utility model, on the other hand, a device having an electric purification module is provided, comprising the electric purification module provided in the above embodiment.
[0113] In this embodiment, since the electric purification module includes a discharge electrode 1, the discharge electrode 1 is provided with multiple rows in a direction parallel to the airflow direction, and any two adjacent rows of discharge electrodes 1 are staggered, the plasma diffusion range around the discharge electrode 1 can be improved, so that the passing polluted air has a greater chance of contacting the plasma, the purification effect is better, and the wind resistance of the electric purification module can be reduced, which is beneficial to increasing the circulating air volume of the whole machine.
[0114] Although the embodiments of the present invention are described in conjunction with the accompanying drawings, those skilled in the art may make various modifications and variations without departing from the spirit and scope of the present invention, and such modifications and variations are all within the scope defined by the appended claims.
Claims
1. An electric purification module, characterized in that: It comprises discharge electrodes (1), wherein the discharge electrodes (1) are arranged in a plurality of rows in a direction parallel to the flow direction of the airflow, the plane where the discharge electrodes (1) in each row are located is perpendicular to the flow direction of the airflow, and any two adjacent rows of discharge electrodes (1) are arranged in a staggered manner.
2. The electric purification module according to claim 1, characterized in that: In a direction parallel to the flow direction of the airflow, the distance between two adjacent discharge electrodes (1) is L1, 6.5 mm ≤ L1 ≤ 10 mm.
3. The electric purification module according to claim 1, characterized in that: The distance between two adjacent discharge electrodes (1) in the same row is L2, 10 mm ≤ L2 ≤ 20 mm.
4. The electric purification module according to claim 3, characterized in that: In a direction perpendicular to the airflow direction, the distance between one discharge electrode (1) in any row and an adjacent discharge electrode (1) in an adjacent row is L3, and L3 is half of L2.
5. The electric purification module according to any one of claims 1 to 4, characterized in that: The number of rows of the discharge electrodes (1) is greater than or equal to 4.
6. The electric purification module according to any one of claims 1 to 4, characterized in that: Each discharge electrode (1) comprises at least two discharge electrodes (1).
7. The electric purification module according to any one of claims 1 to 4, characterized in that: The electric purification module further comprises a grille, which is arranged downstream of the multiple rows of discharge electrodes (1) in the direction of airflow.
8. The electric purification module according to claim 7, characterized in that: The grille comprises a plurality of ribs (2) arranged at intervals, an air hole is formed between two adjacent ribs (2), and the distance between two adjacent ribs (2) is L4, 7mm≤L4≤10mm.
9. The electric purification module according to claim 8, characterized in that: The grille comprises a windward side close to the discharge electrode (1) and a leeward side away from the discharge electrode (1), and the width of the ribs (2) at the windward side is smaller than the width at the leeward side.
10. The electric purification module according to claim 7, characterized in that: The grille comprises a windward side close to the discharge electrode (1) and a leeward side away from the discharge electrode (1), the distance between the windward side and a discharge electrode (1) closest to the windward side in a direction parallel to the airflow direction is L5, and L5 is ≥ 10 mm.
11. The electric purification module according to any one of claims 1 to 4 and 8 to 10, characterized in that: The electric purification module further comprises a shell (3), the shell (3) having an air inlet end (301) and an air outlet end (302), and the discharge electrode (1) is arranged in the shell (3).
12. The electric purification module according to any one of claims 1 to 4 and 8 to 10, characterized in that: The discharge electrode (1) comprises a central electrode, an insulating layer surrounding the central electrode, and an outer electrode spirally wound on the insulating layer.
13. A device having an electric purification module, characterized in that: include: The electric purification module according to any one of claims 1 to 12.