CN117073120A - Multifunctional plasma air purification device and air purifier - Google Patents
Multifunctional plasma air purification device and air purifier Download PDFInfo
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- CN117073120A CN117073120A CN202311118887.XA CN202311118887A CN117073120A CN 117073120 A CN117073120 A CN 117073120A CN 202311118887 A CN202311118887 A CN 202311118887A CN 117073120 A CN117073120 A CN 117073120A
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- 238000004887 air purification Methods 0.000 title claims description 17
- 239000000428 dust Substances 0.000 claims abstract description 147
- 239000002184 metal Substances 0.000 claims abstract description 66
- 239000002245 particle Substances 0.000 claims abstract description 39
- 239000003344 environmental pollutant Substances 0.000 claims abstract description 31
- 231100000719 pollutant Toxicity 0.000 claims abstract description 31
- 239000000356 contaminant Substances 0.000 claims abstract description 25
- 238000001179 sorption measurement Methods 0.000 claims abstract description 3
- 230000005684 electric field Effects 0.000 claims description 38
- 238000004140 cleaning Methods 0.000 claims description 9
- 238000005119 centrifugation Methods 0.000 claims description 8
- 239000004020 conductor Substances 0.000 claims description 8
- 239000010410 layer Substances 0.000 description 27
- 210000002381 plasma Anatomy 0.000 description 24
- 230000000694 effects Effects 0.000 description 19
- 230000009471 action Effects 0.000 description 14
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- 238000009825 accumulation Methods 0.000 description 3
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- 230000001954 sterilising effect Effects 0.000 description 3
- 238000004659 sterilization and disinfection Methods 0.000 description 3
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- 230000002159 abnormal effect Effects 0.000 description 2
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Classifications
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
- F24F8/00—Treatment, e.g. purification, of air supplied to human living or working spaces otherwise than by heating, cooling, humidifying or drying
- F24F8/30—Treatment, e.g. purification, of air supplied to human living or working spaces otherwise than by heating, cooling, humidifying or drying by ionisation
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
- F24F8/00—Treatment, e.g. purification, of air supplied to human living or working spaces otherwise than by heating, cooling, humidifying or drying
- F24F8/10—Treatment, e.g. purification, of air supplied to human living or working spaces otherwise than by heating, cooling, humidifying or drying by separation, e.g. by filtering
- F24F8/183—Treatment, e.g. purification, of air supplied to human living or working spaces otherwise than by heating, cooling, humidifying or drying by separation, e.g. by filtering by centrifugal separation, e.g. using vortices
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
- F24F8/00—Treatment, e.g. purification, of air supplied to human living or working spaces otherwise than by heating, cooling, humidifying or drying
- F24F8/10—Treatment, e.g. purification, of air supplied to human living or working spaces otherwise than by heating, cooling, humidifying or drying by separation, e.g. by filtering
- F24F8/192—Treatment, e.g. purification, of air supplied to human living or working spaces otherwise than by heating, cooling, humidifying or drying by separation, e.g. by filtering by electrical means, e.g. by applying electrostatic fields or high voltages
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- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Electrostatic Separation (AREA)
Abstract
The invention relates to the technical field of filter type air purifiers, and provides a multifunctional plasma air purifying device which is characterized by comprising a tip-barrel-shaped dust collecting area, a high-pressure cyclone centrifugal area and a DBD gaseous pollutant treatment area: the tip-barrel dust collection zone includes: the discharge tip and the grounding discharge ring are used for realizing the charge of particulate matters; the high-pressure cyclone centrifugal zone comprises: the high-pressure cyclone plates are used for providing centrifugal force for cyclone flow so as to realize the adsorption of particles to the metal grounding dust collection plate; the DBD gaseous contaminant treatment zone comprises: a DBD discharge region constituted by a plurality of DBD devices that achieve removal of gaseous pollutants by alternating current discharge, and an insulating layer. The invention can provide the pollutant removal efficiency during electrostatic dust removal.
Description
Technical Field
The invention relates to the technical field of air purification, in particular to a multifunctional plasma air purification device, which is a technology for removing particle pollutants in air by utilizing filter screen sterilization and improving air quality.
Background
With the increasing serious air pollution problem, people's attention and demand on air quality also increase gradually, and this makes air purifier become the requisite in people's daily life. In the prior art, there are air purifiers that mostly act through a filter screen to remove particulate contaminants in the air. However, as time goes by, the filter screen gradually loses its filtering efficiency due to accumulation of a large amount of contaminants, and various bacteria and viruses are easily attached to the dust gradually accumulated on the surface of the filter screen. These microorganisms are present on the filter screen and can be transported into the room by air flow, posing a potential threat to human health.
Studies have shown that the use of a surface dielectric barrier discharge device to generate a plasma can effectively remove bacteria. The device generates a series of active substances with strong sterilization effect, such as ozone and superoxide ions, by ionizing oxygen molecules in the air, thereby effectively inhibiting the propagation and propagation of bacteria. However, in order to achieve a bacterial kill effect of 99.99% on the screen surface, a sufficiently high discharge voltage needs to be used. Too high a discharge voltage also causes problems. First, the surface of the discharge electrode may be damaged due to high temperature. During high voltage discharge, the surface of the discharge electrode can generate higher temperature, and the material of the discharge electrode can be deformed or damaged, so that the service life and stability of the device are affected. Second, too high a voltage can increase the energy consumption of the device, which presents challenges in terms of energy conservation and environmental protection. In order to solve the energy consumption problem, measures such as discharge current and frequency can be optimized to achieve good sterilization effect under lower voltage, so that the energy consumption is reduced.
The plasma is used as a high-energy ionic substance, can charge pollutant particles, realizes deflection dust collection of charged particles, and simultaneously can generate a series of physical and chemical reactions on the excited active groups and the strong oxide and the gaseous pollutants, thereby achieving the effect of removing volatile organic matters.
Therefore, how to realize efficient electrostatic dust removal according to the characteristics of plasma is called a problem to be solved.
In view of this, the present invention proposes a multifunctional plasma air cleaning device, and an air cleaner having the same.
Disclosure of Invention
The invention provides a multifunctional plasma air purifying device, which solves the problem of lower pollutant removal efficiency during electrostatic dust removal.
The technical scheme of the invention is as follows:
a multifunctional plasma air purification device, which is characterized by comprising a tip-barrel dust collection area, a high-pressure cyclone centrifugal area and a DBD gaseous pollutant treatment area:
the tip-barrel dust collection zone includes: the discharge tip and the grounding discharge ring are used for realizing the charge of particulate matters;
the high-pressure cyclone centrifugal zone comprises: the high-pressure cyclone plates are used for providing centrifugal force for cyclone flow so as to realize the adsorption of particles to the metal grounding dust collection plate;
the DBD gaseous contaminant treatment zone comprises: a DBD discharge region constituted by a plurality of DBD devices that achieve removal of gaseous pollutants by alternating current discharge, and an insulating layer.
Optionally, the tip-barrel dust collection area, the high-pressure cyclone centrifugation area and the DBD gaseous pollutant treatment area are of a cylindrical structure.
Optionally, the tip-barrel dust collecting area is connected by a high-voltage direct current power supply, and a conical electric field is formed between the discharge tip and the grounded discharge ring, so that the charging and deflection of the particulate matters are realized.
Optionally, the grounding discharge ring of the tip-barrel-shaped dust collecting area is connected with the low-voltage pole of the high-voltage direct-current power supply through a high-voltage direct-current grounding wire, and the discharge tip of the tip-barrel-shaped dust collecting area is connected with the high-voltage pole of the high-voltage direct-current power supply through a high-voltage direct-current high-voltage wire.
Optionally, the ground discharge ring is located above a discharge tip, and the tip of the discharge tip corresponds to the center of the ground discharge ring.
Optionally, the high-pressure cyclone centrifugal area further comprises a cyclone plate center column, the cyclone plate center column is arranged in a circumferential manner by taking the cyclone plate center column as an axis, the high-pressure cyclone plates are arranged in a louver type manner, and the high-pressure cyclone plates are made of metal conductive materials.
Optionally, the high-voltage cyclone plate of the tip-barrel-shaped dust collection area is connected with the high-voltage pole of the high-voltage direct-current power supply through a high-voltage direct-current high-voltage wire, and the metal grounding dust collection plate of the tip-barrel-shaped dust collection area is connected with the low-voltage pole of the high-voltage direct-current power supply through a high-voltage direct-current grounding wire.
Optionally, the structure of the DBD device is a sandwich structure of high voltage metal plate-insulating single layer-low voltage metal plate-insulating single layer-high voltage metal plate arrangement.
Optionally, the high-voltage metal plate in the DBD device is connected to the high-voltage pole of the high-voltage ac power supply through a high-voltage ac high-voltage line, and the low-voltage metal plate in the DBD device is connected to the low-voltage pole of the high-voltage ac power supply through a high-voltage ac ground line.
Further, the invention provides an air purifier comprising the multifunctional plasma air purifying device, which is characterized in that the multifunctional plasma air purifying device is arranged in the air purifier.
Optionally, the multifunctional plasma air purification device of the air purifier is detachably arranged on the surface of the filter screen.
Compared with the prior art, the invention has the advantages that:
1. in the invention, the space purification function is set by the partitions (a tip-barrel-shaped dust collection area, a high-pressure cyclone centrifugal area and a DBD gaseous pollutant treatment area), and the electrostatic dust removal progressive layer by layer is carried out, so that the high-efficiency removal of the particulate matters and the gaseous pollutants is realized;
2. in the invention, a conical electric field is formed between the tip and the ground in the tip-barrel dust collection area, so that the charge and deflection of particles are realized, and most of the particles are removed through charge dust collection;
3. according to the invention, in the high-pressure cyclone centrifugal area, based on the synergistic effect of an electric purification technology and cyclone, charged particles and particulate matters are fully charged under the action of mixed flow, and collection of fine particulate matters is improved under the combined action of electric field force and centrifugal force, so that deep removal of the particulate matters is realized, and further dust collection efficiency of the particulate matters is improved.
4. In the invention, in the DBD gaseous pollutant treatment area, gaseous pollutants are efficiently removed based on high-frequency alternating current DBD discharge, so that the effect of deeply purifying air is achieved;
5. according to the invention, dust collection efficiency can be ensured under high wind speed and high-frequency alternating current discharge, and meanwhile, indoor peculiar smell and gaseous pollutants can be treated, so that multifunctional and efficient air purification is realized;
6. in the invention, the multifunctional plasma air purifying device is designed as a cyclone device integrating discharge and cyclone generation, and the device has a simple structure and is convenient to clean.
Drawings
The invention will be described in more detail hereinafter on the basis of embodiments and with reference to the accompanying drawings.
Fig. 1 is a schematic structural view of a multifunctional plasma air-purifying device in an embodiment of the present invention;
FIG. 2 is a schematic cross-sectional view of a tip-barrel dust collection area in an embodiment of the invention;
FIG. 3 is a schematic cross-sectional view of a high pressure cyclonic centrifuge zone in an embodiment of the invention;
FIG. 4 is a schematic diagram of the wiring of a high pressure swirl plate in an embodiment of the present invention;
fig. 5 is a schematic cross-sectional view of a DBD gaseous contaminant treatment zone in an embodiment of the invention;
fig. 6 is a schematic diagram of a single DBD device structure and its wiring in a DBD gaseous contaminant treatment zone in an embodiment of the present invention;
reference numerals:
1. a discharge tip; 2. a ground discharge ring; 3. an insulating spacer layer; 4. a tip-barrel dust collection zone; 5. a high-pressure cyclone centrifugal area; 6. a high pressure swirl plate; 7. a swirl plate center column 7; 8. a metal grounding dust collection plate; 9. an insulating layer; 10. a high-voltage metal plate; 11. a low-voltage metal plate; 12. a DBD gaseous contaminant treatment zone; 13. a high voltage DC power supply; 14. high voltage dc high voltage line; 15. a high voltage direct current grounding wire; 16. a high voltage ac power supply; 17. a high-voltage alternating current grounding wire; 18. high voltage ac high voltage line; 19. a support structure; 20. an insulating monolayer.
Detailed Description
The following description of the embodiments of the present invention will be made clearly and fully with reference to the accompanying drawings, in which it is evident that the embodiments described are only some, but not all embodiments of the invention. All other embodiments, which can be made by those skilled in the art based on the embodiments of the invention without making any inventive effort, are intended to be within the scope of the invention. It should be noted that, if directional indications (such as up, down, left, right, front, and rear … …) are included in the embodiments of the present invention, the directional indications are merely used to explain the relative positional relationship, movement conditions, etc. between the components in a specific posture (as shown in the drawings), and if the specific posture is changed, the directional indications are correspondingly changed.
In order that the invention may be readily understood, a more complete description of the invention will be rendered by reference to the appended drawings. Several embodiments of the invention are shown in the drawings. This invention may, however, be embodied in many different forms and should not be construed as limited to the embodiments set forth herein. Rather, these embodiments are provided so that this disclosure will be thorough and complete.
In addition, if there is a description of "first", "second", etc. in the embodiments of the present invention, the description of "first", "second", etc. is for descriptive purposes only and is not to be construed as indicating or implying a relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defining "a first" or "a second" may explicitly or implicitly include at least one such feature. In addition, the technical solutions of the embodiments may be combined with each other, but it is necessary to base that the technical solutions can be realized by those skilled in the art, and when the technical solutions are contradictory or cannot be realized, the combination of the technical solutions should be considered to be absent and not within the scope of protection claimed in the present invention.
It will be understood that when an element is referred to as being "mounted" on another element, it can be directly on the other element or intervening elements may also be present. When an element is referred to as being "connected" to another element, it can be directly connected to the other element or intervening elements may also be present. The terms "vertical," "horizontal," "left," "right," and the like are used herein for illustrative purposes only.
Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs. The terminology used herein in the description of the invention is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention. The term "and/or" as used herein includes any and all combinations of one or more of the associated listed items.
Example 1
Referring to fig. 1, a schematic structure diagram of a multifunctional plasma air purification device according to the present invention includes a tip-barrel dust collecting region 4, a high-pressure cyclone centrifugal region 5, and a DBD (Dielectric Barrier Discharges, dielectric barrier discharge) gaseous pollutant treating region 12.
The tip-barrel dust collection zone 4, the high-pressure cyclone centrifugation zone 5, and the DBD gaseous contaminant treatment zone 12 are of cylindrical structure.
Referring to fig. 2, a schematic cross-sectional view of the tip-barrel dust collection area 4 is shown.
Specifically, the tip-barrel dust collection area 4 includes: discharge tip 1, ground discharge ring 2, insulating spacer layer and support structure 19.
The diameter of the grounding discharge ring 2 is smaller than or far smaller than the diameter corresponding to the cylindrical structural section corresponding to the tip-barrel-shaped dust collecting area 4.
In the embodiment of the present invention, the discharge tip 1 is a member that plays a role in discharging in a discharge device, and generally has a sharp shape.
It may be a sharp metal needle or rod, or a small electrode. When a high voltage is applied to the discharge tip 1, it creates a region of extremely high electric field strength, causing discharge of charge in the surrounding air or medium.
The discharge tip 1 operates on the principle that an electric field is concentrated by a sharp-shaped electrode, thereby increasing the electric field strength so that electric charges are concentrated at the tip. The concentrated electric field can promote electrons to obtain enough energy, overcome the resistance of the medium and generate ionization and discharge phenomena. The sharp shape of the discharge tip 1 also contributes to the electron emission and ionization process.
The discharge tip 1 is widely applied to the fields of gas discharge devices, lightning protection systems, corona discharge devices and the like. The electric charge can be effectively promoted to discharge at a specific position, and the expected effect is achieved.
Specifically, the discharge tip 1 may be a discharge needle through which a discharge electric field may be formed.
The ground discharge ring 2 is located above the discharge tip 1, and the tip of the discharge tip 1 corresponds to the center of the ground discharge ring 2.
In detail, the ground discharge ring 2 is a device for discharge protection, which is an annular conductive member, typically made of metal or conductive material.
The ground discharge ring 2 works on the principle that charges generated by static electricity are led into the ground by connecting the ground discharge ring with the ground or the ground, so that the safe discharge of the static electricity is realized. When static electricity is accumulated on the surface of the object, the conductive ring on the ground discharge ring 2 plays a role of a conductor to guide the electric charge to the ground. This prevents charge from accumulating to dangerous levels, preventing spark discharge, electrical shock or other possible electrostatic hazards.
In an alternative embodiment of the invention, the ground discharge ring 2 may be formed by making holes in a plate.
The tip-barrel dust collecting area 4 may have a plurality of discharge tips 1 and a plurality of ground discharge rings 2, and the discharge tips 1 and the ground discharge rings 2 are in a one-to-one correspondence.
The tip-barrel dust collection area 4 is connected by a high-voltage direct current power supply 13, and a conical electric field is formed between the tip and the ground so as to realize the charge and deflection of the particles.
Specifically, the grounding discharge ring 2 of the tip-barrel dust collecting zone 4 is connected with the low voltage pole of the high voltage direct current power supply 13 through the high voltage direct current grounding wire 15, and the discharge tip 1 of the tip-barrel dust collecting zone 4 is connected with the high voltage pole of the high voltage direct current power supply 13 through the high voltage direct current high voltage wire 14 to form a current loop.
In the embodiment of the invention, the supporting structural member 19 is arranged around the outer side of the tip-barrel-shaped dust collecting area 4, and the structure for supporting the tip-barrel-shaped dust collecting area 4 is realized through the supporting structural member 19;
the insulating spacer 3 is provided between the discharge space region formed by the discharge tip 1 and the ground discharge ring 2 and the support member, the edge effect caused by discharge is reduced by providing the insulating spacer 3, and the discharge safety of the tip-cylindrical dust collecting region 4 is ensured.
In a practical application scenario of the present invention, air enters the air purifying device, and passes through the tip-barrel dust collecting area 4 to perform charged dust collection so as to remove most of particulate matters.
Through the design of the invention, the following beneficial effects can be realized:
in the tip-barrel dust collection area 4, based on the conical electric field formed between the tip and the ground, the charge and deflection of the particles are realized, and most of the particles are removed through the charge dust collection.
Referring to fig. 3, a schematic cross-sectional view of the high pressure cyclonic centrifugal section 5 is shown.
Specifically, the high-pressure cyclone centrifugation area 5 includes: a plurality of high-pressure cyclone plates 6, a cyclone plate central column 7, an insulating layer 9 and a metal grounding dust collection plate 8.
In the embodiment of the invention, the high-pressure cyclone plate 6 is made of a metal conductive material, the high-pressure cyclone plate 6 is circumferentially arranged by taking the central column 7 of the cyclone plate as an axis, and the high-pressure cyclone plate 6 is arranged in a shutter type.
The vertical surface of the high-pressure cyclone plate 6 forms a preset angle with the horizontal direction. Specifically, the preset angle may be set to different inclination angles according to the selection requirement.
Referring to fig. 4, a wiring schematic diagram of the high-pressure cyclone plate 6 is shown.
Specifically, the high-voltage cyclone centrifugal area 5 is connected through a high-voltage direct-current power supply 13, the high-voltage cyclone plate 6 of the tip-barrel-shaped dust collection area 4 is connected with the high-voltage pole of the high-voltage direct-current power supply 13 through a high-voltage direct-current high-voltage wire 14, and the metal grounding dust collection plate 8 of the tip-barrel-shaped dust collection area 4 is connected with the low-voltage pole of the high-voltage direct-current power supply 13 through a high-voltage direct-current grounding wire 15 to form a current loop.
The insulating layer 9 is arranged on the outer side of the high-pressure cyclone plate 6 in a surrounding mode, and the insulating layer 9 and the high-pressure cyclone plate 6 are coaxial; the metal grounding dust collection plate 8 is arranged on the outer side of the insulating layer 9 in a surrounding mode, and the metal grounding dust collection plate 8 is coaxial with the insulating layer 9 and the high-voltage cyclone plate 6.
The metal grounding dust collector plate 8 is a key component for use in dust collection systems, and is typically made of a metal material and installed in a dust collector or exhaust system.
The main function of the metal grounding dust collecting plate 8 is to collect dust and realize grounding.
The metal ground dust collecting plate 8 adsorbs charged dust on its surface by utilizing its conductive property, and guides the charge of the dust to the ground through connection with the ground (or the ground), thereby realizing separation and safe handling of the dust. By properly grounding the metal dust collection plate, static accumulation of dust in the system can be prevented, reducing the risk of fire and explosion.
In another alternative embodiment of the present invention, the metal grounding dust collecting plate 8 is in a detachable structure, and dust collected by the metal grounding dust collecting plate 8 can be cleaned by detaching the metal grounding dust collecting plate 8, and the metal grounding dust collecting plate 8 is convenient to clean.
The high-pressure cyclone centrifugal area 5 can isolate the high-pressure cyclone plate 6 from the metal grounding dust collection plate 8 by arranging an insulating layer 9.
In the embodiment of the invention, the discharge tip 1 of the tip-barrel-shaped dust collecting area 4 performs high-voltage direct current tip discharge, and generates a plurality of positive and negative plasmas after air breakdown, when dust particles pass through, the dust particles can be combined with charged ions due to diffusion effect and collision effect, and the charged ions are charged; under the action of swirling in the high-pressure swirling centrifugal area 5, charged ions and dust particles can be more fully collided and contacted, so that more charged ions are charged on single particles, more and more full charges are caused, and the charged particles are more subjected to the action of electric field force by the method, thereby improving the dust collection efficiency.
Through the design of the invention, the following beneficial effects can be realized:
in the high-pressure cyclone centrifugal area 5, based on the synergistic effect of an electric purification technology and cyclone, charged particles and particulate matters are fully charged under the action of mixed flow, and collection of fine particulate matters is improved under the combined action of electric field force and centrifugal force, so that deep removal of the particulate matters is realized, and the dust collection efficiency of the particulate matters is further improved;
can ensure dust collection efficiency under high wind speed and high frequency alternating current discharge, and can treat indoor peculiar smell and gaseous pollutants simultaneously, thereby realizing multifunctional and efficient air purification.
Referring to fig. 5, a schematic cross-sectional view of the DBD gaseous contaminant treatment zone 12 is shown.
Specifically, the DBD gaseous contaminant treatment zone 12 comprises: a DBD discharge region constituted by a plurality of DBD devices, and an insulating layer 9.
In the embodiment of the invention, a plurality of DBD devices are arranged adjacently in sequence, so that a DBD discharge area is formed.
The insulating layer 9 is disposed outside the DBD discharge region.
Referring to fig. 6, a schematic diagram of a single DBD device structure and its wiring in the DBD gaseous contaminant treatment zone 12 is shown.
The DBD device is a sandwich structure in which the high-voltage metal plate 10-insulating single layer 20-low-voltage metal plate 11-insulating single layer 20-high-voltage metal plate 10 is arranged.
In detail, the DBD device refers to a dielectric barrier discharge (Dielectric Barrier Discharge) device, also referred to as a cold plasma device, which is a device commonly used in the fields of air treatment, static electricity elimination, chemical reaction, contaminant degradation, and the like.
The principle of operation of dielectric barrier discharge is based on the dielectric insulation properties and the action of an electric field. When an electric field is applied to the medium, polarization of the medium occurs, i.e., atoms or molecules within the medium rearrange under the influence of the electric field.
In the dielectric layer of an insulator or capacitor, the action of the electric field causes an equal but different number of polarization charges to be generated inside the dielectric. These polarized charges create an electric field opposite to the electric field, thereby counteracting or weakening the effects of the external electric field. Since the medium has high impedance or good insulating property, charges cannot freely move in the medium, thereby preventing discharge or discharge of charges.
In other words, the dielectric barrier discharge works on the principle that the movement of charges is prevented by the insulating property of the dielectric, so that the charges cannot be released or discharged.
In the embodiment of the invention, by adding the insulating single layer 20 on the low-voltage metal plate 11 of the middle layer, abnormal discharge and edge effect of metal caused by surface roughness difference can be reduced, and meanwhile, generation of byproducts (such as ozone) can be slowed down.
The high-voltage metal plate 10 in the DBD device is connected to the high-voltage pole of the high-voltage ac power supply 16 through the high-voltage ac high-voltage line 18, and the low-voltage metal plate 11 in the DBD device is connected to the low-voltage pole of the high-voltage ac power supply 16 through the high-voltage ac ground line 17.
In the embodiment of the invention, the micro-channel discharge generated by the alternating current DBD and a large amount of active oxidizing substances are utilized to generate a series of physical and chemical reactions with the gaseous pollutants, so that the microstructure of the original gaseous pollutants is changed, and the beneficial effect of removing the polluted gas is achieved.
The working flow of the multifunctional plasma air purifying device according to the tip-barrel dust collecting area 4, the high-pressure cyclone centrifugal area 5 and the DBD gaseous pollutant treating area 12 is as follows:
when the multifunctional plasma air purifying device is operated, air enters from the lower end of the device, passes through the tip-barrel-shaped dust collecting area 4 to carry out charged dust collection, and most of particulate matters are removed.
Then, the air continues to move upwards, and passes through the high-pressure cyclone centrifugal area 5, the cyclone device of the high-pressure cyclone centrifugal area 5 can provide enough electric field force and centrifugal force, so that the particles which are not fully charged in the first step are fully rotated and centrifuged on the metal grounding dust collection plate 8, and the deep removal of the particles is realized; each high-pressure cyclone plate 6 is connected with high pressure through a direct-current high-voltage power supply, so that the effect of restricting the movement direction of charged particles can be achieved, the enrichment of the particles on the high-pressure cyclone plates 6 can be reduced as much as possible in the process of rotary dust collection, and the surface cleaning of the high-pressure cyclone plates 6 is ensured;
after passing through the tip-barrel dust collection zone 4 and the high pressure cyclone centrifugation zone 5, particulate contaminants have been substantially removed.
As the gas continues to move upward, it reaches the DBD gaseous contaminant treatment zone 12, and gaseous contaminants can be removed efficiently by high frequency ac DBD discharge, achieving the effect of deep air purification.
According to the embodiment of the invention, through the multifunctional plasma air purifying device, the particles can be efficiently collected and the gaseous pollutants can be effectively treated under the condition of high air quantity/air speed.
The invention solves the technical problems of complex structure, low efficiency and poor collection capability of small particles of the dust removing device/air purifying device in the current market, and treats VOCs (Volatile Organic Compounds ) and indoor peculiar smell by an alternating current DBD discharge technology to create a safe and comfortable environment.
Under the synergistic effect of electrostatic dust removal and cyclone technology, the invention improves the collection of fine particles and can still ensure the dust collection efficiency at high wind speed; meanwhile, the indoor peculiar smell and the gaseous pollutant can be treated, and the multifunctional and efficient air purification is realized.
Example two
The embodiment of the invention also provides an air purifier based on the multifunctional plasma air purifying device, which is characterized in that the multifunctional plasma air purifying device is arranged in the air purifier.
Referring to fig. 1, a schematic structural diagram of a multifunctional plasma air purifying device according to the present invention includes a tip-barrel dust collecting region 4, a high-pressure cyclone centrifugal region 5, and a DBD (Dielectric Barrier Discharges, dielectric barrier discharge) gaseous pollutant treating region.
The tip-barrel dust collection zone 4, the high-pressure cyclone centrifugation zone 5, and the DBD gaseous contaminant treatment zone 12 are of cylindrical structure.
Referring to fig. 2, a schematic cross-sectional view of the tip-barrel dust collection area 4 is shown.
Specifically, the tip-barrel dust collection area 4 includes: discharge tip 1, ground discharge ring 2, insulating spacer layer 3 and support structure 19.
The diameter of the grounding discharge ring 2 is smaller than or far smaller than the diameter corresponding to the cylindrical structural section corresponding to the tip-barrel-shaped dust collecting area 4.
In the embodiment of the present invention, the discharge tip 1 is a member that plays a role in discharging in a discharge device, and generally has a sharp shape.
It may be a sharp metal needle or rod, or a small electrode. When a high voltage is applied to the discharge tip 1, it creates a region of extremely high electric field strength, causing discharge of charge in the surrounding air or medium.
The discharge tip 1 operates on the principle that an electric field is concentrated by a sharp-shaped electrode, thereby increasing the electric field strength so that electric charges are concentrated at the tip. The concentrated electric field can promote electrons to obtain enough energy, overcome the resistance of the medium and generate ionization and discharge phenomena. The sharp shape of the discharge tip 1 also contributes to the electron emission and ionization process.
The discharge tip 1 is widely applied to the fields of gas discharge devices, lightning protection systems, corona discharge devices and the like. The electric charge can be effectively promoted to discharge at a specific position, and the expected effect is achieved.
Specifically, the discharge tip 1 may be a discharge needle through which a discharge electric field may be formed.
The ground discharge ring 2 is located above the discharge tip 1, and the tip of the discharge tip 1 corresponds to the center of the ground discharge ring 2.
In detail, the ground discharge ring 2 is a device for discharge protection, which is an annular conductive member, typically made of metal or conductive material.
The ground discharge ring 2 works on the principle that charges generated by static electricity are led into the ground by connecting the ground discharge ring with the ground or the ground, so that the safe discharge of the static electricity is realized. When static electricity is accumulated on the surface of the object, the conductive ring on the ground discharge ring 2 plays a role of a conductor to guide the electric charge to the ground. This prevents charge from accumulating to dangerous levels, preventing spark discharge, electrical shock or other possible electrostatic hazards.
In an alternative embodiment of the invention, the ground discharge ring 2 may be formed by making holes in a plate.
The tip-barrel dust collecting area 4 may have a plurality of discharge tips 1 and a plurality of ground discharge rings 2, and the discharge tips 1 and the ground discharge rings 2 are in a one-to-one correspondence.
The tip-barrel dust collection area 4 is connected by a high-voltage direct current power supply 13, and a conical electric field is formed between the tip and the ground so as to realize the charge and deflection of the particles.
Specifically, the grounding discharge ring 2 of the tip-barrel dust collecting zone 4 is connected with the low voltage pole of the high voltage direct current power supply 13 through the high voltage direct current grounding wire 15, and the discharge tip 1 of the tip-barrel dust collecting zone 4 is connected with the high voltage pole of the high voltage direct current power supply 13 through the high voltage direct current high voltage wire 14 to form a current loop.
In the embodiment of the invention, the supporting structural member 19 is arranged around the outer side of the tip-barrel-shaped dust collecting area 4, and the structure for supporting the tip-barrel-shaped dust collecting area 4 is realized through the supporting structural member 19;
the insulating spacer 3 is provided between the discharge space region formed by the discharge tip 1 and the ground discharge ring 2 and the support member, the edge effect caused by discharge is reduced by providing the insulating spacer 3, and the discharge safety of the tip-cylindrical dust collecting region 4 is ensured.
In a practical application scenario of the present invention, air enters the air purifying device, and passes through the tip-barrel dust collecting area 4 to perform charged dust collection so as to remove most of particulate matters.
Through the design of the invention, the following beneficial effects can be realized:
in the tip-barrel dust collection area 4, based on the conical electric field formed between the tip and the ground, the charge and deflection of the particles are realized, and most of the particles are removed through the charge dust collection.
Referring to fig. 3, a schematic cross-sectional view of the high pressure cyclonic centrifugal section 5 is shown.
Specifically, the high-pressure cyclone centrifugation area 5 includes: a plurality of high-pressure cyclone plates 6, a cyclone plate central column 7, an insulating layer 9 and a metal grounding dust collection plate 8.
In the embodiment of the invention, the high-pressure cyclone plate 6 is made of a metal conductive material, the high-pressure cyclone plate 6 is circumferentially arranged by taking the central column 7 of the cyclone plate as an axis, and the high-pressure cyclone plate 6 is arranged in a shutter type.
The vertical surface of the high-pressure cyclone plate 6 forms a preset angle with the horizontal direction. Specifically, the preset angle may be set to different inclination angles according to the selection requirement.
Referring to fig. 4, a wiring schematic diagram of the high-pressure cyclone plate 6 is shown.
Specifically, the high-voltage cyclone centrifugal area 5 is connected through a high-voltage direct-current power supply 13, the high-voltage cyclone plate 6 of the tip-barrel-shaped dust collection area 4 is connected with the high-voltage pole of the high-voltage direct-current power supply 13 through a high-voltage direct-current high-voltage wire 14, and the metal grounding dust collection plate 8 of the tip-barrel-shaped dust collection area 4 is connected with the low-voltage pole of the high-voltage direct-current power supply 13 through a high-voltage direct-current grounding wire 15 to form a current loop.
The insulating layer 9 is arranged on the outer side of the high-pressure cyclone plate 6 in a surrounding mode, and the insulating layer 9 and the high-pressure cyclone plate 6 are coaxial; the metal grounding dust collection plate 8 is arranged on the outer side of the insulating layer 9 in a surrounding mode, and the metal grounding dust collection plate 8 is coaxial with the insulating layer 9 and the high-voltage cyclone plate 6.
The metal grounding dust collector plate 8 is a key component for use in dust collection systems, and is typically made of a metal material and installed in a dust collector or exhaust system.
The main function of the metal grounding dust collecting plate 8 is to collect dust and realize grounding.
The metal ground dust collecting plate 8 adsorbs charged dust on its surface by utilizing its conductive property, and guides the charge of the dust to the ground through connection with the ground (or the ground), thereby realizing separation and safe handling of the dust. By properly grounding the metal dust collection plate, static accumulation of dust in the system can be prevented, reducing the risk of fire and explosion.
In another alternative embodiment of the present invention, the metal grounding dust collecting plate 8 is in a detachable structure, and dust collected by the metal grounding dust collecting plate 8 can be cleaned by detaching the metal grounding dust collecting plate 8, and the metal grounding dust collecting plate 8 is convenient to clean.
The high-pressure cyclone centrifugal area 5 can isolate the high-pressure cyclone plate 6 from the metal grounding dust collection plate 8 by arranging an insulating layer 9.
In the embodiment of the invention, the discharge tip 1 of the tip-barrel-shaped dust collecting area 4 performs high-voltage direct current tip discharge, and generates a plurality of positive and negative plasmas after air breakdown, when dust particles pass through, the dust particles can be combined with charged ions due to diffusion effect and collision effect, and the charged ions are charged; under the action of swirling in the high-pressure swirling centrifugal area 5, charged ions and dust particles can be more fully collided and contacted, so that more charged ions are charged on single particles, more and more full charges are caused, and the charged particles are more subjected to the action of electric field force by the method, thereby improving the dust collection efficiency.
Through the design of the invention, the following beneficial effects can be realized:
in the high-pressure cyclone centrifugal area 5, based on the synergistic effect of an electric purification technology and cyclone, charged particles and particulate matters are fully charged under the action of mixed flow, and collection of fine particulate matters is improved under the combined action of electric field force and centrifugal force, so that deep removal of the particulate matters is realized, and the dust collection efficiency of the particulate matters is further improved;
can ensure dust collection efficiency under high wind speed and high frequency alternating current discharge, and can treat indoor peculiar smell and gaseous pollutants simultaneously, thereby realizing multifunctional and efficient air purification.
Referring to fig. 5, a schematic cross-sectional view of the DBD gaseous contaminant treatment zone 12 is shown.
Specifically, the DBD gaseous contaminant treatment zone 12 comprises: a DBD discharge region constituted by a plurality of DBD devices, and an insulating layer 9.
In the embodiment of the invention, a plurality of DBD devices are arranged adjacently in sequence, so that a DBD discharge area is formed.
The insulating layer 9 is disposed outside the DBD discharge region.
Referring to fig. 6, a schematic diagram of a single DBD device structure and its wiring in the DBD gaseous contaminant treatment zone 12 is shown.
The DBD device is a sandwich structure in which the high-voltage metal plate 10-insulating single layer 20-low-voltage metal plate 11-insulating single layer 20-high-voltage metal plate 10 is arranged.
In detail, the DBD device refers to a dielectric barrier discharge (Dielectric Barrier Discharge) device, also referred to as a cold plasma device, which is a device commonly used in the fields of air treatment, static electricity elimination, chemical reaction, contaminant degradation, and the like.
The principle of operation of dielectric barrier discharge is based on the dielectric insulation properties and the action of an electric field. When an electric field is applied to the medium, polarization of the medium occurs, i.e., atoms or molecules within the medium rearrange under the influence of the electric field.
In the dielectric layer of an insulator or capacitor, the action of the electric field causes an equal but different number of polarization charges to be generated inside the dielectric. These polarized charges create an electric field opposite to the electric field, thereby counteracting or weakening the effects of the external electric field. Since the medium has high impedance or good insulating property, charges cannot freely move in the medium, thereby preventing discharge or discharge of charges.
In other words, the dielectric barrier discharge works on the principle that the movement of charges is prevented by the insulating property of the dielectric, so that the charges cannot be released or discharged.
In the embodiment of the invention, by adding the insulating single layer 20 on the low-voltage metal plate 11 of the middle layer, abnormal discharge and edge effect of metal caused by surface roughness difference can be reduced, and meanwhile, generation of byproducts (such as ozone) can be slowed down.
The high-voltage metal plate 10 in the DBD device is connected to the high-voltage pole of the high-voltage ac power supply 16 through the high-voltage ac high-voltage line 18, and the low-voltage metal plate 11 in the DBD device is connected to the low-voltage pole of the high-voltage ac power supply 16 through the high-voltage ac ground line 17.
In the embodiment of the invention, the micro-channel discharge generated by the alternating current DBD and a large amount of active oxidizing substances are utilized to generate a series of physical and chemical reactions with the gaseous pollutants, so that the microstructure of the original gaseous pollutants is changed, and the beneficial effect of removing the polluted gas is achieved.
The working flow of the multifunctional plasma air purifying device according to the tip-barrel dust collecting area 4, the high-pressure cyclone centrifugal area 5 and the DBD gaseous pollutant treating area 12 is as follows:
when the multifunctional plasma air purifying device is operated, air enters from the lower end of the device, passes through the tip-barrel-shaped dust collecting area 4 to carry out charged dust collection, and most of particulate matters are removed.
Then, the air continues to move upwards, and passes through the high-pressure cyclone centrifugal area 5, the cyclone device of the high-pressure cyclone centrifugal area 5 can provide enough electric field force and centrifugal force, so that the particles which are not fully charged in the first step are fully rotated and centrifuged on the metal grounding dust collection plate 8, and the deep removal of the particles is realized; each high-pressure cyclone plate 6 is connected with high pressure through a direct-current high-voltage power supply, so that the effect of restricting the movement direction of charged particles can be achieved, the enrichment of the particles on the high-pressure cyclone plates 6 can be reduced as much as possible in the process of rotary dust collection, and the surface cleaning of the high-pressure cyclone plates 6 is ensured;
after passing through the tip-barrel dust collection zone 4 and the high pressure cyclone centrifugation zone 5, particulate contaminants have been substantially removed.
As the gas continues to move upward, it reaches the DBD gaseous contaminant treatment zone 12, and gaseous contaminants can be removed efficiently by high frequency ac DBD discharge, achieving the effect of deep air purification.
According to the embodiment of the invention, through the air purifier, the particles can be efficiently collected and the gaseous pollutants can be effectively treated under the condition of high air quantity/air speed.
The invention solves the technical problems of complex structure, low efficiency and poor collection capability of small particles of the dust removing device/air purifying device in the current market, and treats VOCs (Volatile Organic Compounds ) and indoor peculiar smell by an alternating current DBD discharge technology to create a safe and comfortable environment.
Under the synergistic effect of electrostatic dust removal and cyclone technology, the invention improves the collection of fine particles and can still ensure the dust collection efficiency at high wind speed; meanwhile, the indoor peculiar smell and the gaseous pollutant can be treated, and the multifunctional and efficient air purification is realized.
The foregoing description of the preferred embodiments of the invention is not intended to be limiting, but rather is intended to cover all modifications, equivalents, alternatives, and improvements that fall within the spirit and scope of the invention.
While the invention has been described with reference to a preferred embodiment, various modifications may be made and equivalents may be substituted for elements thereof without departing from the scope of the invention. In particular, the technical features mentioned in the respective embodiments may be combined in any manner as long as there is no structural conflict. The present invention is not limited to the specific embodiments disclosed herein, but encompasses all technical solutions falling within the scope of the claims.
Claims (10)
1. A multifunctional plasma air purification device, which is characterized by comprising a tip-barrel dust collection area, a high-pressure cyclone centrifugal area and a DBD gaseous pollutant treatment area:
the tip-barrel dust collection zone includes: the discharge tip and the grounding discharge ring are used for realizing the charge of particulate matters;
the high-pressure cyclone centrifugal zone comprises: the high-pressure cyclone plates are used for providing centrifugal force for cyclone flow so as to realize the adsorption of particles to the metal grounding dust collection plate;
the DBD gaseous contaminant treatment zone comprises: a DBD discharge region constituted by a plurality of DBD devices that achieve removal of gaseous pollutants by alternating current discharge, and an insulating layer.
2. The multifunctional plasma air cleaning apparatus according to claim 1, wherein the tip-barrel dust collection zone, the high-pressure cyclone centrifugation zone, and the DBD gaseous contaminant treatment zone are of a cylindrical structure.
3. The multifunctional plasma air cleaning device according to claim 1, wherein the tip-barrel dust collection area is connected by a high voltage direct current power supply, and a conical electric field is formed between the discharge tip and the grounded discharge ring to realize the charge and deflection of the particulate matters.
4. The multifunctional plasma air cleaning apparatus according to claim 1, wherein the ground discharge ring of the tip-barrel dust collection area is connected to the low voltage pole of the high voltage dc power supply through a high voltage dc ground wire, and the discharge tip of the tip-barrel dust collection area is connected to the high voltage pole of the high voltage dc power supply through a high voltage dc high voltage wire.
5. The multifunctional plasma air cleaning device according to claim 1, wherein the ground discharge ring is located above a discharge tip, and the tip of the discharge tip corresponds to the center of the ground discharge ring.
6. The multifunctional plasma air purification device of claim 1, wherein the high-pressure cyclone centrifugal area further comprises a cyclone plate center column, the cyclone plate center column is arranged in a circumferential manner by taking the cyclone plate center column as an axis, the high-pressure cyclone plates are arranged in a louver type manner, and the high-pressure cyclone plates are made of metal conductive materials.
7. The multifunctional plasma air cleaning apparatus according to claim 1, wherein the high-voltage cyclone plate of the tip-cylinder dust collecting area is connected to the high-voltage pole of the high-voltage direct current power supply through a high-voltage direct current high-voltage wire, and the metal grounding dust collecting plate of the tip-cylinder dust collecting area is connected to the low-voltage pole of the high-voltage direct current power supply through a high-voltage direct current grounding wire.
8. The multifunctional plasma air purification apparatus of claim 1, wherein the DBD device has a structure of a sandwich of high voltage metal plate-insulating single layer-low voltage metal plate-insulating single layer-high voltage metal plate arrangement.
9. The multifunctional plasma air cleaning device according to claim 8, wherein the high voltage metal plate in the DBD device is connected to the high voltage pole of the high voltage ac power supply through a high voltage ac high voltage line, and the low voltage metal plate in the DBD device is connected to the low voltage pole of the high voltage ac power supply through a high voltage ac ground line.
10. An air purifier comprising the multifunctional plasma air purifier of claim 1, wherein the multifunctional plasma air purifier of claim 1 is disposed within the air purifier.
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| CN202311118887.XA CN117073120A (en) | 2023-08-31 | 2023-08-31 | Multifunctional plasma air purification device and air purifier |
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| CN202311118887.XA CN117073120A (en) | 2023-08-31 | 2023-08-31 | Multifunctional plasma air purification device and air purifier |
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