CN118119076A - Method for reducing adsorption of particulate pollutants on discharge electrode of ion fan - Google Patents
Method for reducing adsorption of particulate pollutants on discharge electrode of ion fan Download PDFInfo
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Abstract
A method for reducing the adsorption of particulate pollutants on a discharge electrode of an ion fan belongs to the field of static elimination. An auxiliary electrode with a ring structure is correspondingly arranged around each high-voltage electrode needle; and applying voltage with the same polarity and the same voltage amplitude as the enclosed high-voltage electrode needle to each auxiliary electrode, so that the space electric field intensity of the high-voltage electrode needle in the space surrounded by the auxiliary electrode is zero, and the particles cannot be charged, or the charged particles or charged particles have no electric field force effect in the space, and the particles can rapidly leave the area where the high-voltage electrode needle is positioned under the action of the drag force of an airflow field, thereby reducing the adsorption of the particle pollutants on the high-voltage electrode needle. The adsorption/adhesion of the particulate pollutants in the using process of the ion fan is reduced, the original power-eliminating speed and power-eliminating performance are maintained, the adsorption of the particulate pollutants on the electrode needle of the ion fan and the electrode of the metal net cover is reduced, and the effective service life of the ion fan is prolonged.
Description
Technical Field
The invention belongs to the field of static electricity elimination, and particularly relates to an ion fan type static electricity elimination device for active static electricity elimination.
Background
The ion fan is widely applied to production and assembly sites in the electronic and photoelectric industries, and plays a vital role in electrostatic safety protection of products.
A typical ion blower discharge structure is shown in fig. 1, in which, in an air duct 1 outputting air flow from an ion blower, a plurality of high-voltage electrode pins 2 are disposed, at the front end of the air duct outputting air flow from the ion blower (the outlet end 1-2 of the air duct in the drawing), a grounded metal mesh cover electrode 3 is disposed, and the direction a (also referred to as the air outlet direction) of the air flow output from the ion blower is from the rear of the high-voltage electrode pins toward the grounded metal mesh cover electrode (the direction from top to bottom in the drawing, i.e. from the inlet end 1-1 of the air duct toward the outlet end 1-2 of the air duct).
Along with the long-time use of the ion blower, the high-voltage electrode needle (also called a discharge electrode) and the grounded metal mesh cover electrode gradually adsorb more and more particulate pollutants. The particle pollutants adsorbed on the high-voltage electrode needle can form a large number of irregular microscopic bulges or tips on the surface of the high-voltage electrode, so that the normal discharge of the high-voltage electrode needle tip structure is affected, and the discharge stability is reduced; the particle pollutants are adsorbed on the tip of the electrode, so that the quantity of positive ions and negative ions released by the discharge needle is gradually reduced, the electricity eliminating performance is reduced, and even the corona blocking of the electrode needle can not generate discharge when serious, so that the electricity eliminating capability is lost; meanwhile, the adsorption of the particulate pollutants also changes the receiving resistance of the metal mesh enclosure to positive and negative ions, and interferes the monitoring feedback function of the metal mesh enclosure electrode to the discharge circuit.
The utility model patent with the date of grant 2019.12.10 and the number of grant CN 209767895U discloses an ion fan discharging device with a positioning cleaning brush, which comprises a structural support and an electrode needle, wherein the electrode needle is arranged on the structural support; the tail part of the electrode needle is fixed on the structural support; the direction of the needle point of the electrode needle head part is arranged in the same direction with the air outlet direction of the ion fan; the electrode needles are annularly and uniformly distributed on the structural support at the air outlet side of the ion fan by taking the central position of the structural support as the circle center; a circular groove is formed in the center of the air outlet side structure support of the ion fan, a second motor is arranged in the circular groove, and a brush assembly is arranged on a rotating shaft of the second motor; the brush assembly includes a brush handle coupled to the rotational shaft of the second motor and a brush head disposed on the brush handle. Through the structure, the automatic cleaning function of the electrode needle at regular time is realized, so that the stable discharge capacity of the electrode needle of the ion fan is ensured, the effective working time of the ion fan is prolonged, and the service life is prolonged.
However, this technical scheme needs to set up extra cleaning device (the brush subassembly that sets up on second motor and rotation axis thereof) at the air outlet of ion fan, has increased the complexity and the spare part quantity of ion fan product structure, is unfavorable for simplification and the field maintenance of ion fan structure.
In addition, in order to reduce the adsorption of particulate pollutants in the use environment of the conventional ion fan, a filter screen cotton is arranged at the air inlet of the fan, and the filter screen cotton is used for blocking a part of particulate pollutants. However, in this way, the wind speed of the ion blower for conveying positive ions and negative ions is inevitably reduced, the electricity eliminating speed is slowed down, and the electricity eliminating performance is obviously affected. The specific reasons are as follows:
1) Because the filter screen cotton is arranged at the air inlet of the fan, the wind resistance is increased, the output wind speed is reduced, the speed of the air flow carrying ions is reduced, and the power-off time is prolonged;
2) The wind resistance increases, so that the fan power loss increases, and the energy cost (running cost) for using the ion blower increases.
How to reduce the adsorption/adhesion of particulate pollutants in the use environment under the condition of maintaining the original wind resistance, wind speed, speed of the movement of the air current carrying ions, electricity eliminating speed and electricity eliminating performance basically unchanged is an actual technical problem which needs to be solved in actual work.
Disclosure of Invention
The invention aims to provide a method for reducing the adsorption of particulate pollutants on a discharge electrode of an ion fan. The method comprises the steps that annular auxiliary electrodes are arranged around an original high-voltage electrode needle, voltages with the same polarity and amplitude as those of corresponding high-voltage electrode needles are applied to the annular auxiliary electrodes, and particulate pollutants flow out forwards under the action of drag force of an airflow field; the method also increases the local gas flow speed around the high-voltage electrode needle, reduces the adsorption/adhesion of particulate pollutants in the use environment, simplifies the structure of the ion fan as much as possible on the premise of not increasing the field maintenance workload of the ion fan, maintains the original power elimination speed and power elimination performance, reduces the adsorption of the particulate pollutants of the electrode needle of the ion fan and the electrode of the metal mesh enclosure, prolongs the time for keeping the higher power elimination performance of the ion fan, and prolongs the effective service life of the ion fan.
The technical scheme of the invention is as follows: the method for reducing the adsorption of the particulate pollutants on the discharge electrode of the ion fan is characterized by comprising the following steps of:
an auxiliary electrode is correspondingly arranged around each high-voltage electrode needle;
The auxiliary electrode is of an annular structure and is sleeved around the high-voltage electrode needle;
And applying voltage with the same polarity and the same voltage amplitude as the enclosed high-voltage electrode needle to each auxiliary electrode, so that the space electric field intensity of the high-voltage electrode needle in the space surrounded by the auxiliary electrode is zero, and the particles cannot be charged, or the charged particles or charged particles have no electric field force effect in the space, and the particles can rapidly leave the area where the high-voltage electrode needle is positioned under the action of the drag force of an airflow field, thereby reducing the adsorption of the particle pollutants on the high-voltage electrode needle.
Specifically, the outer surface of the auxiliary electrode is cylindrical, and the inner surface is horn-shaped.
Further, the horn opening end of the auxiliary electrode faces the incoming flow direction of the output airflow of the ion fan.
Specifically, the cone part of the high-voltage electrode needle protrudes out of the auxiliary electrode which is arranged corresponding to the cone part, and the whole cone part of the high-voltage electrode needle is positioned in front of the incoming flow direction of the output airflow of the ion fan and extends out of the auxiliary electrode.
Further, the central axis of the auxiliary electrode coincides with the central axis of the high-voltage electrode needle correspondingly surrounded by the auxiliary electrode.
Specifically, the electric field intensity at the tip of the cone part of the high-voltage electrode needle is consistent with the electric field intensity generated at the tip of the high-voltage electrode needle under the original high-voltage amplitude when no auxiliary electrode is arranged.
Specifically, a plurality of high-voltage electrode pins and auxiliary electrodes respectively corresponding to the high-voltage electrode pins form a space discharge structure together with the grounded metal mesh cover electrode.
Specifically, in the method for reducing the adsorption of the particulate pollutants on the discharge electrode of the ion fan, the electric field intensity at the tip of the high-voltage electrode needle after the auxiliary electrode is arranged is consistent with the electric field intensity at the tip of the high-voltage electrode needle when the auxiliary electrode is not arranged by improving the voltage amplitude applied to the high-voltage electrode needle and the auxiliary electrode correspondingly arranged.
Further, in the method for reducing the adsorption of the particulate pollutants on the discharge electrode of the ion fan, the annular auxiliary electrode with the same polarity and voltage amplitude as the high-voltage electrode needle is arranged, so that the electric field intensity of the inner space of the auxiliary electrode is extremely low and even zero at the rear of the cone of the high-voltage electrode needle; even if the particulate pollutants are charged, the particulate pollutants cannot be adsorbed on the electrode needle under the action of electric field force; and most of the particle pollutants flow forward under the action of the drag force of the airflow field, so that the adsorption/adhesion of the particle pollutants on the high-voltage electrode needle of the ion fan and the metal mesh cover electrode is reduced.
Furthermore, the method for reducing the adsorption of the particulate pollutants on the discharge electrode of the ion fan increases the gas flowing speed in the local space around the high-voltage electrode needle by arranging the annular auxiliary electrode around the original high-voltage electrode needle, is beneficial to the forward outflow of the particulate pollutants under the action of the drag force of the airflow field, reduces the adsorption/adhesion degree of the particulate pollutants on the high-voltage electrode needle in the use environment, prolongs the time for keeping higher electricity eliminating performance of the ion fan, and prolongs the effective service life of the ion fan.
Compared with the prior art, the invention has the advantages that:
1. by adopting the technical scheme, the adsorption of the electrode particle pollutants of the discharge electrode (needle) and the metal mesh cover can be reduced without arranging air inlet filter cotton, so that the wind resistance is not obviously changed, the ion airflow speed is hardly influenced, and the electricity eliminating performance is not reduced;
2. By adopting the technical scheme, the electric field intensity of the internal space of the auxiliary electrode is extremely low (even zero) behind the high-voltage electrode needle cone due to the arrangement of the auxiliary electrode with the same polarity and the same voltage amplitude; even if the particulate pollutants are charged, the particulate pollutants cannot be adsorbed to the electrode needle under the action of electric field force; thus, most of the particulate contaminants flow forward under the drag of the airflow field;
3. through setting up annular auxiliary electrode, reduced the absorption/adhesion of the particulate pollutant in the ion fan use, under the prerequisite that does not increase ion fan field maintenance work load, simplified the structure of ion fan as far as possible, maintained original extinction speed and extinction performance, reduced the absorption of the particulate pollutant on ion fan electrode needle and the metal screen panel electrode to the time that the ion fan kept higher extinction performance has been prolonged, ion fan's effective life has been prolonged.
Drawings
FIG. 1 is a schematic diagram of a typical discharge structure of a conventional ion blower;
FIG. 2-1 is a schematic perspective view of a high voltage electrode needle and its auxiliary electrode;
FIG. 2-2 is a schematic side sectional view of a high voltage electrode needle and its auxiliary electrode;
FIGS. 2-3 are schematic bottom views of the high voltage electrode needle and its auxiliary electrode;
FIG. 3 is a schematic diagram of the overall structure of the discharging structure according to the present embodiment;
FIG. 4 is a schematic view of the partially broken-away structure of FIG. 3;
FIG. 5-1 is a schematic diagram showing the adsorption state of particles in the discharge structure according to the present embodiment;
FIG. 5-2 is a schematic illustration of the structure of FIG. 5-1 in a top view of the particulate adsorption state;
FIG. 5-3 is a schematic illustration of the structure of FIG. 5-1 in a side view of the particulate adsorption state;
FIG. 5-4 is a schematic illustration of the structure of FIG. 5-1 from a central axis to a circumferential direction;
FIG. 6-1 is a schematic view showing the state of particle adsorption of the electrode needle under the discharge structure of FIG. 5-1;
FIG. 6-2 is a schematic view showing the particle adsorption state of the electrode needle at the view angle of FIG. 5-3;
FIG. 6-3 is a schematic view showing the particle adsorption state of the electrode needle at the view angle of FIG. 5-4;
FIG. 7 is a graph showing the adsorption rate of particles under the discharge structure according to the present invention;
FIG. 8-1 is a schematic diagram showing the state of adsorption of particles in a discharge structure according to the prior art;
FIG. 8-2 is a schematic diagram showing the discharge structure of FIG. 8-1 in a state of adsorbing particles in a top view;
FIG. 8-3 is a schematic diagram showing the state of adsorption of particles in a side view of the discharge structure of FIG. 8-1;
FIG. 8-4 is a schematic view of the discharge structure of FIG. 8-1 from the center axis to the circumferential direction;
FIG. 9 is a graph showing the adsorption rate of particles in the discharge structure of FIG. 8-1;
Fig. 10 is a flow chart of the method according to the present invention.
In the figure, 1 is an air duct, 1-1 is an inlet end of the air duct, 1-2 is an outlet end of the air duct, 2 is a high-voltage electrode needle, 2-1 is a cone at the front end of the high-voltage electrode needle, 2-2 is the rear end of the high-voltage electrode needle, 3 is a grounded metal mesh cover electrode, 4 is an auxiliary electrode, 4-1 is a horn opening end of the auxiliary electrode, 4-2 is the front end of the auxiliary electrode, and 5 is particulate pollutants.
A is the direction of the air flow output by the ion fan.
Detailed Description
The invention is further described below with reference to the drawings and examples.
1. Referring to fig. 2-1 and 10, in the present technical solution, an annular auxiliary electrode 4 is disposed around each high-voltage electrode needle 2, so that each high-voltage electrode needle is surrounded by the auxiliary electrode 4;
The voltage amplitude applied by the auxiliary electrode and the enclosed high-voltage electrode needle are of the same polarity.
The purpose of the arrangement is to make the space surrounded by the auxiliary electrode of the high-voltage electrode needle have zero space electric field intensity, so that the particles cannot be charged, or the charged particles or charged particles have no electric field force in the space, and rapidly leave the area where the high-voltage electrode needle is located under the action of the flow field drag force.
2. As shown in fig. 2-2, the cone part of the high-voltage electrode needle (the cone at the front end of the high-voltage electrode needle is labeled with 2-1 in the figure) protrudes from the auxiliary electrode correspondingly arranged, and the whole cone part is positioned in front of the incoming flow direction of the output air flow of the ion fan and extends out of the auxiliary electrode.
The purpose of the arrangement is that the influence of the auxiliary electrode on the ionization capacity of the high-voltage electrode needle is effectively reduced, the discharge performance of the auxiliary electrode is not obviously reduced, and the excessively high requirement and the insulation requirement on the output voltage amplitude of the high-voltage circuit are reduced.
3. As shown in fig. 2-2, the outer surface of the auxiliary electrode 4 is cylindrical, the inner surface is in a horn shape, and the horn opening end 4-1 of the auxiliary electrode (also referred to as the rear end of the auxiliary electrode) faces the incoming flow direction of the air flow output by the ion blower, so as to accelerate the incoming flow of air, and enable suspended particles in the air flow to quickly pass through the area where the high-voltage electrode needle is located;
furthermore, the front end 4-2 of the auxiliary electrode is a smooth curved surface, preferably an arc-shaped curved surface, so as to reduce disturbance of irregular shapes on the output airflow of the ion fan and reduce influence on the discharge effect of the high-voltage electrode needle cone.
4. As shown in fig. 2-3, the central axis of the auxiliary electrode coincides with the central axis of its corresponding high voltage electrode needle.
5. After the auxiliary electrode is arranged, in order not to influence the ionization capacity of the high-voltage electrode needle under the original high-voltage amplitude value when the auxiliary electrode is not arranged, the voltage amplitude value applied to the high-voltage electrode needle and the corresponding auxiliary electrode is properly increased, so that the electric field intensity at the tip of the cone part 2-1 of the high-voltage electrode needle is consistent with the electric field intensity generated at the tip of the high-voltage electrode needle under the original high-voltage amplitude value when the auxiliary electrode is not arranged.
6. Thus, as shown in fig. 3, a plurality of high-voltage electrode pins and auxiliary electrodes respectively corresponding to the high-voltage electrode pins and a grounded metal mesh cover electrode positioned in front of the high-voltage electrode pins form a space discharge structure together.
7. In order to verify the effect of the auxiliary electrode on reducing the adsorption of particles, a simulation test is particularly carried out on the discharge structure/device in the technical scheme:
1) In simulation software, the discharge structure of the technical scheme is constructed, as shown in figure 3; because the discharge structure and the physical field simultaneously meet symmetry, the structure of fig. 3 is symmetrically split to form a calculation structural space shown in fig. 4 in order to simplify a simulation model and improve calculation efficiency.
2) For the simulation space shown in fig. 4, the following electrostatic field physical model is applied:
D＝ε0εrE
Wherein E is the electric field strength (V/m), V is the voltage (V) applied by the electrode, D is the electrical displacement (C/m 2),ε0＝8.854187817×10-12 F/m is the vacuum dielectric constant, ε r is the relative dielectric constant of the substance.
The following laminar flow field physical model:
Wherein ρ is the fluid density, kg/m 3; u is the fluid velocity, m/s; p is the gas pressure, pa; i is an identity matrix; mu is hydrodynamic viscosity, pa.s.
3) Taking the 2 physical fields as background physical fields, and setting physical boundary conditions such as high-voltage electrode needle voltage, auxiliary electrode voltage, inlet wind speed and the like:
If positive and negative high-voltage electrode needles and positive and negative auxiliary electrodes correspondingly arranged are respectively applied with +6500V and-6500V voltages, and the inlet wind speed is set to be 1m/s; performing simulation operation to obtain the parameter distribution of the background physical field; wherein the field strength at the tip of the resulting high voltage electrode needle is about 3.7093 X10 7 V/m.
4) Based on the parameter distribution of the background physical field, the following particle saturated charge and stress model is applied:
After the particulate pollutants in the use environment enter an electrofluidic field of the ion blower, the particulate pollutants are charged by positive ions and negative ions and are electrostatically charged to become charged particles; it is mainly subjected to 2 forces, one being the electric field force:
Fe＝eZE
Wherein: e= 1.602176634 × -19 C is a meta charge; z is the charge number; e is the electric field strength, V/m.
One is the flow field drag force, and in this scheme, a standard drag related model is used to simulate the drag force suffered by particles in the flow field:
CD＝f(Rer)
Wherein: τ p is the particle velocity response time, s; ρ d is the particle density, kg/m 3;dp is the particle diameter, m; mu is hydrodynamic viscosity, pa.s; c D is a resistance coefficient which is a function of the relative Reynolds number of particles in the flow field, and an expression is determined in real time, dynamically and sectionally according to the density, viscosity and speed of gas, the diameter and speed of particles in the gas-solid two-phase electrofluidic field; re r is the relative Reynolds number of the particles in the flow field; ρ is the fluid density, kg/m 3; u is the fluid velocity at the location of the particle, m/s; v is the particle velocity, m/s; s is a resistance correction factor; kn is the knudsen number; c 1,C2,C3 is an experience coefficient; lambda is the mean free path of molecules in the surrounding fluid, m; p is the gas pressure, pa.
In order to show the effect of the auxiliary electrode more prominently, obviously and rapidly and simplify the simulation model, a saturated charge model is directly adopted for particle charge:
Wherein: z s is the particle saturation charge number, ε rp is the particle dielectric constant, ε 0＝8.854187817×10-12 F/m is the vacuum dielectric constant.
In summary, the stress equation of the charged particles in the ionic wind turbine electric fluid field is as follows:
Wherein: m p is the mass of the particles, kg; q is the spatial position vector of the particle.
5) Setting boundary conditions such as particle mass density, diameter, relative dielectric constant of particles, number and distribution of particle inlets and the like for the particle saturated charge and stress model:
For example, the particle mass density ρ d＝2329[kg/m3 is set; the particle diameter can be set to 10 μm diameter particles (assuming spherical for simplicity of the model) that are common in atmospheric environments and are more charged; particle relative dielectric constant epsilon rp = 11.7; the particles are simultaneously and evenly input along with the air flow from the air inlet, and 1000 particles with positive and negative charges are respectively arranged; and executing simulation operation to finally obtain the state distribution of the particles.
8. The simulation test results of the technical scheme are shown in fig. 5-1 to 5-4, and are the adsorption state of the particulate pollutants 5 (particles for short) in the discharge structure after the auxiliary electrode is arranged, and a large number of particles are adsorbed on the surface of the auxiliary electrode 4. As shown in fig. 6-1 to 6-3, the high voltage electrode needle and the metal mesh cover electrode have less particulate contaminants adsorbed thereon. It can be seen from fig. 7 that the adsorption rates of the particles on the electrode needle and the metal mesh cover electrode after 2s are about 7% and 8.3%, respectively, along with the movement of the air flow after the auxiliary electrode is provided.
9. For comparison, the simulation test is also carried out on the existing discharge structure without the auxiliary electrode, the same background physical field model is applied, the applied voltages of the positive high-voltage electrode needle and the negative high-voltage electrode needle are respectively +5600V and-5600V, the electric field intensity of the needle tip is 3.6956 X10 7 V/m, and the electric field intensity of the needle tip is basically consistent with the electric field intensity of the electrode needle tip after the auxiliary electrode is arranged, so that the influence on the ionization capacity of the electrode needle is eliminated; and other setting conditions, the two technical schemes (namely the existing and improved technical schemes) are consistent.
The test results of the conventional discharge structure are shown in fig. 8-1 to 8-4, and are the particulate adsorption state in the discharge structure without the auxiliary electrode.
As can be seen from fig. 8-1 to 8-4, a large amount of particles are adsorbed on the surface of the high voltage electrode needle 2, almost covering it; more particulate contaminants are also adsorbed onto the grounded metal mesh enclosure electrode 3.
As can be seen from fig. 9, when no auxiliary electrode is provided, the adsorption rate of particles on the electrode cover of the high-voltage electrode needle and the grounded metal mesh cover after 2s is 35% and 52.7%, respectively, which is much higher than that of the discharge structure of the present technical scheme provided with the auxiliary electrode along with the movement of the air flow; thereby, the technical feasibility and the implementation technical effect of the technical scheme are proved.
According to the technical scheme, the annular auxiliary electrode is arranged around the original high-voltage electrode needle, so that the gas flowing speed in the local space around the high-voltage electrode needle is increased, and the particulate pollutants can flow forwards under the action of the drag force of the airflow field; by arranging the annular auxiliary electrode with the same polarity and voltage amplitude as the high-voltage electrode needle, the electric field intensity of the inner space of the auxiliary electrode is extremely low and even zero behind the high-voltage electrode needle cone; even if the particle pollutants are charged, no electric field force acts on the particle pollutants, so that the particle pollutants are adsorbed on the electrode needle, most of the particle pollutants flow forwards under the action of the drag force of the airflow field, the adsorption/adhesion degree of the particle pollutants on the high-voltage electrode needle and the metal screen electrode of the ion fan is reduced, the time for keeping higher electricity eliminating performance of the ion fan can be prolonged, and the effective service life of the ion fan is prolonged.
The invention can be widely applied to the field of design and manufacture of ion fans.
Claims (10)
1. A method for reducing the adsorption of particulate pollutants on a discharge electrode of an ion blower is characterized by comprising the following steps:
an auxiliary electrode is correspondingly arranged around each high-voltage electrode needle;
The auxiliary electrode is of an annular structure and is sleeved around the high-voltage electrode needle;
And applying voltage with the same polarity and the same voltage amplitude as the enclosed high-voltage electrode needle to each auxiliary electrode, so that the space electric field intensity of the high-voltage electrode needle in the space surrounded by the auxiliary electrode is zero, and the particles cannot be charged, or the charged particles or charged particles have no electric field force effect in the space, and the particles can rapidly leave the area where the high-voltage electrode needle is positioned under the action of the drag force of an airflow field, thereby reducing the adsorption of the particle pollutants on the high-voltage electrode needle.
2. The method for reducing particulate contaminant adsorption on a discharge electrode of an ion blower according to claim 1, wherein said auxiliary electrode has a cylindrical outer surface and a horn-shaped inner surface.
3. The method of reducing particulate contaminant adsorption to a discharge electrode of an ion blower according to claim 2, wherein said horn open end of said auxiliary electrode is oriented in the direction of incoming flow of the output gas stream of the ion blower.
4. The method for reducing particulate contaminant adsorption on a discharge electrode of an ion blower according to claim 1, wherein the cone portion of the high-voltage electrode needle protrudes from the auxiliary electrode arranged corresponding to the cone portion, and the whole cone portion is positioned in front of the incoming direction of the output air flow of the ion blower and protrudes outside the auxiliary electrode.
5. The method for reducing particulate contaminant adsorption on a discharge electrode of an ion blower according to claim 1, wherein a central axis of said auxiliary electrode coincides with a central axis of a corresponding high-voltage electrode needle.
6. The method for reducing particulate contaminant adsorption on a discharge electrode of an ion blower according to claim 1, wherein the electric field strength at the tip of the cone portion of the high-voltage electrode is identical to the electric field strength at the tip of the high-voltage electrode needle at the original high-voltage amplitude when the auxiliary electrode is not provided.
7. The method for reducing particulate contaminant adsorption on a discharge electrode of an ion blower according to claim 1, wherein a plurality of said high voltage electrode pins and their respective associated auxiliary electrodes together with a grounded metal mesh cover electrode together form a space discharge structure.
8. The method for reducing particulate contaminant adsorption on an ion blower discharge electrode according to claim 1, wherein the method for reducing particulate contaminant adsorption on an ion blower discharge electrode is characterized in that the electric field intensity at the tip of the high-voltage electrode needle after the auxiliary electrode is disposed is made to coincide with the electric field intensity at the tip of the high-voltage electrode needle when the auxiliary electrode is not disposed by increasing the voltage amplitude applied to the high-voltage electrode needle and the auxiliary electrode disposed correspondingly thereto.
9. The method for reducing the adsorption of the particulate pollutants on the discharge electrode of the ion blower according to claim 1, wherein the method for reducing the adsorption of the particulate pollutants on the discharge electrode of the ion blower is characterized in that the annular auxiliary electrode with the same voltage amplitude as the high-voltage electrode needle is arranged, so that the electric field intensity of the inner space surrounded by the auxiliary electrode is extremely low or even zero behind the cone of the high-voltage electrode needle; even if the particulate contaminant is charged, no electric field force acts on the particulate contaminant, so that the particulate contaminant is adsorbed on the electrode needle; and most of the particle pollutants flow forward under the action of the drag force of the airflow field, so that the adsorption/adhesion of the particle pollutants on the high-voltage electrode needle of the ion fan and the metal mesh cover electrode is reduced.
10. The method for reducing the adsorption of the particulate pollutants on the discharge electrode of the ion fan according to claim 1, wherein the method for reducing the adsorption of the particulate pollutants on the discharge electrode of the ion fan is characterized in that the annular auxiliary electrode is arranged around the original high-voltage electrode needle, so that the speed of gas flowing in a local space around the high-voltage electrode needle is increased, the particulate pollutants can flow forwards under the action of the drag force of an airflow field, the adsorption/adhesion degree of the particulate pollutants on the high-voltage electrode needle in the use environment is reduced, the time for keeping higher electricity eliminating performance of the ion fan is prolonged, and the effective service life of the ion fan is prolonged.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202211517808.8A CN118119076A (en) | 2022-11-30 | 2022-11-30 | Method for reducing adsorption of particulate pollutants on discharge electrode of ion fan |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202211517808.8A CN118119076A (en) | 2022-11-30 | 2022-11-30 | Method for reducing adsorption of particulate pollutants on discharge electrode of ion fan |
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| Publication Number | Publication Date |
|---|---|
| CN118119076A true CN118119076A (en) | 2024-05-31 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202211517808.8A Pending CN118119076A (en) | 2022-11-30 | 2022-11-30 | Method for reducing adsorption of particulate pollutants on discharge electrode of ion fan |
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| CN (1) | CN118119076A (en) |
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2022
- 2022-11-30 CN CN202211517808.8A patent/CN118119076A/en active Pending
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