CN114992764A

CN114992764A - AC/DC enhanced discharge plasma air purifier

Info

Publication number: CN114992764A
Application number: CN202210664646.4A
Authority: CN
Inventors: 陈兆权; 任鑫柳; 陈思乐; 张三阳; 洪伶俐
Original assignee: Anhui University of Technology AHUT
Current assignee: Anhui University of Technology AHUT
Priority date: 2022-06-13
Filing date: 2022-06-13
Publication date: 2022-09-02

Abstract

The invention discloses an alternating current-direct current enhanced discharge plasma air purifier, which belongs to the technical field of air purifiers and comprises a shell and a partition plate arranged in the shell, wherein the partition plate divides an inner cavity of the shell into a purification cavity and an equipment cavity; the dust purifying device is characterized in that a dust purifying part and a dust collecting part are arranged in the purifying cavity, a circuit element and a circuit board are arranged in the equipment cavity, wherein the circuit element is arranged on the circuit board, and the circuit element is connected with the dust purifying part through a lead. According to the alternating current-direct current enhanced discharge plasma air purification device, the generated pulse enables the electrode to vibrate, so that dust is shaken off, and the electrode self-cleaning effect is achieved; the alternating current is provided on the discharge electrode, and the alternating current can generate a back corona layer, so that oil stain substances are prevented from being landed on the discharge electrode, and the dust removal strength is enhanced; the charged dust particles move in one direction to the discharge electrode 31, thereby enhancing the dust removal strength.

Description

AC/DC enhanced discharge plasma air purifier

Technical Field

The invention relates to the technical field of purifiers, in particular to an alternating current-direct current enhanced discharge plasma air purifier.

Background

The air purifier is a product capable of adsorbing, decomposing or converting various air pollutants (generally including PM2.5, dust, pollen, peculiar smell, formaldehyde and other decoration pollution, bacteria, allergen and the like), can effectively improve the cleanliness of air, and is mainly used for indoor environments of families, offices, markets and the like. The electrostatic dust collection is one of gas dust collection methods, and the working principle of the electrostatic dust collection is that corona discharge is generated by using a high-voltage electrostatic field, so that air molecules in the electric field are ionized and then collide with dust particles to charge suspended dust particles; the charged dust particles move towards the electrode plate with the opposite polarity to the charged dust particles under the action of the electric field force, so that the suspended dust particles are separated from the gas and are collected at the electrode plate. If the polar plate works for a long time and is not cleaned regularly, the dust collecting efficiency is influenced, and the arc discharge risk is greatly increased, so that the dust collecting plate needs to be cleaned manually (or by means of a specific tool) regularly, and the disassembly and assembly work is troublesome. Air purifier that appears in the existing market generally volume and weight are all great, and the shared space is great, and can only place on subaerial or hang in a certain specific position on the wall, can not place in a flexible way according to the distribution of interior space, consequently has certain use restriction to the narrow and small room of area.

Chinese patent application No. 201910872092.5, entitled publication No. CN (51)0479488a, entitled publication No. 2019 (51) 22 discloses an electrostatic precipitator in which high voltage direct current is applied between composite dust collecting films connected to different electrodes to achieve electrostatic dust collection. However, the dust collection mode has the risk of arc discharge, and is not provided with an ash cleaning and unloading device for cleaning the electrode and preventing secondary dust emission, so that the dust collection efficiency is influenced.

Chinese patent "air cleaner" (application No. 202010184486.4, publication No. CN (51) 5550267a, publication No. 2020.06.09) discloses an air cleaner, which uses a plasma field around a generator winding to make air molecules flowing through ionize and carry positive charges, then the ionized air molecules accelerate under the action of an electric field force to collide with other particles and make other particles and dust and bacteria passing through the electric field carry charges, and finally the pollutants such as bacteria and dust are adsorbed by a dust collecting impeller. But the cleaning work of impeller needs to dismantle it, and on the one hand, it is comparatively troublesome to dismantle the installation, and on the other hand, after using for a period of time, the junction of blade will become flexible because of the dismouting is frequent, need overhaul to make the life of clarifier shorten.

The Chinese patent air purifier (application number: 202020928864.0, publication number: CN 255619051U, publication number: 2021.02.26) discloses an air purifier, which has the functions of automatically cleaning a filter screen and humidifying air, so that the air purification and the air humidification can be performed simultaneously, but the air purifier has larger volume, occupies more space and is inconvenient to move, so that the application range of the air purifier is limited to a certain extent.

Therefore, how to create an air purification device which has no arc discharge risk, self-cleaning of dust adsorbed by an electrode, simple structure and convenient carrying is a problem which is urgently needed to be solved at present; based on the design, the invention designs the AC/DC enhanced discharge plasma air purifier to solve the problems, and the device also has the advantages of energy conservation, environmental protection, low cost, simple operation, high reliability, small volume and the like.

Disclosure of Invention

The invention aims to provide an alternating current-direct current enhanced discharge plasma air purifier to solve the problems in the background technology.

In order to achieve the purpose, the invention provides the following technical scheme: an alternating current-direct current enhanced discharge plasma air purifier comprises a shell and a partition plate arranged in the shell, wherein the partition plate divides an inner cavity of the shell into a purification chamber and an equipment chamber;

a dust purification part and a dust collection part are arranged in the purification cavity, and a circuit element and a circuit board are arranged in the equipment cavity, wherein the circuit element is arranged on the circuit board and is connected with the dust purification part through a lead;

the circuit component is used for controlling the dust purifying part to remove dust in the air and uniformly storing the filtered dust through the dust collecting part.

Further, the dust purification component comprises a discharge electrode, an electrode frame, a fan, an air inlet, an air outlet, a motor and a fan shaft, wherein the discharge electrode is arranged on the electrode frame;

the air inlet and the air outlet are symmetrically arranged on two sides of the shell, the motor is connected with the fan through a fan shaft, the fan is arranged at the air outlet, and the discharge electrode is arranged on a connecting line of the centers of the air inlet and the air outlet.

Further, the discharge electrode was a cylindrical metal bare electrode having a diameter of 1 cm.

Furthermore, the dust collecting component comprises a dust collecting box, a dust blocking net, a buffer frame and a buffer spring, wherein the dust blocking net is arranged in the purification chamber and divides the purification chamber, and the air inlet and the air outlet are respectively positioned at two sides of the dust blocking net;

the dust collecting box is positioned on the bottom wall of the shell below the discharge electrode, and the bottom edge of the dust blocking net is contacted with the edge of the dust collecting box;

the buffer frames are fixed at two ends of the electrode frame and connected with the inner wall of the shell through buffer springs.

Further, keep off the dust and be equipped with the vibration subassembly on the net, the vibration subassembly includes vibrating arm, vibrating motor and vibration frame, and the vibration frame sets up on keeping off the dust net, and vibrating motor passes through the bolt and installs on the bottom of vibration frame to the last vibrating arm of connecting of vibrating motor is connected with the top of keeping off the dust net.

Furthermore, the circuit element comprises a lithium ion battery, a mechanical switch, a voltage reduction module, a direct current high-voltage pack, a charging module and a hardware system module, the lithium ion battery and the charging module are arranged at the lower end of the equipment cavity and are electrically connected, and the voltage reduction module is connected with the motor, the lithium ion battery and the mechanical switch through leads respectively.

Furthermore, the voltage of the voltage reduction module is 5V, and the negative direct-current high voltage output by the direct-current high-voltage package is-6 kV.

Furthermore, the hardware system module comprises a MOSFET tube, a pulse signal generator, a ZVS module and a high-frequency high-voltage transformer, wherein the anode and the cathode of the discharge electrode are respectively connected with the high-frequency high-voltage transformer and the voltage reduction module, and the high-frequency high-voltage transformer is respectively connected with the ZVS module and the voltage reduction module;

the direct-current high-voltage pack, the pulse signal generator, the ZVS module, the discharge electrode, the lithium ion battery and the mechanical switch are connected through leads respectively.

Further, the frequency of a pulse signal of the pulse signal generator is 200Hz, the duty ratio is 0-1, the square wave direct current voltage is 15V, the output pulse frequency of the ZVS module is 20kHz, the working voltage is 55V-30V, the transformation ratio of the high-frequency high-voltage transformer is 1: 100.

compared with the prior art, the invention has the beneficial effects that:

1. according to the invention, a lithium ion battery acts on a direct-current high-voltage package through a voltage reduction module, the direct-current high-voltage package generates negative direct-current high voltage, one end of a secondary winding of a high-frequency high-voltage transformer is connected with the negative direct-current high voltage in series, the other end of the secondary winding is connected with an inner conductor of an electrode, and the generated pulse enables the electrode to vibrate, so that dust is shaken off to achieve the self-cleaning effect of the electrode;

2. the AC/DC enhanced discharge plasma air purification device has the advantages that the AC/DC enhanced discharge plasma air purification device is equivalent to a discharge form combining corona discharge and DBD, has higher discharge intensity than single discharge, increases the concentration of plasma, increases charged particles, and prevents oil stain substances from falling on a discharge electrode, so that the dust removal strength is enhanced;

3. according to the air purification device, the voltage of the direct-current high-voltage package is kept at-6 kV, so that the arc discharge phenomenon is not easy to generate; in addition, the negative high voltage of the direct current high voltage package increases the concentration of plasma, enhances the charge power of dust particles, and enables the charged dust particles to move in a single direction towards the discharge electrode 31, thereby enhancing the dust removal strength.

Drawings

FIG. 1 is a schematic circuit diagram of the present invention;

FIG. 2 is an overall block diagram of the present invention;

FIG. 3 is a partial internal block diagram of the present invention;

FIG. 4 is a view of the dust screen partition structure of the present invention;

FIG. 5 is a view of the dust screen and partition in accordance with the present invention, shown with the structure removed;

fig. 6 is an enlarged view of fig. 5 a according to the present invention.

In the figure: 1. a housing; 2. a partition plate; 3. a dust purification member; 31. a discharge electrode; 32. an electrode holder; 33. a fan; 34. an air inlet; 35. an air outlet; 36. a motor; 37. a fan shaft; 4. a dust collecting member; 41. a dust collection box; 42. a dust blocking net; 43. a buffer frame; 44. a buffer spring; 5. a circuit element; 51. a lithium ion battery; 52. a mechanical switch; 53. a voltage reduction module; 54. a direct current high voltage pack; 55. a charging module; 56. a MOSFET tube; 58. a ZVS module; 59. a high-frequency high-voltage transformer; 6. A circuit board; 7. a vibrating assembly; 71. a vibrating rod; 72. a vibration motor; 73. and (5) vibrating the rack.

Detailed Description

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be obtained by a person skilled in the art without making any creative effort based on the embodiments in the present invention, belong to the protection scope of the present invention.

Referring to fig. 1-6, an ac/dc enhanced discharge plasma air purifier includes a housing 1 and a partition plate 2 disposed inside the housing, wherein the partition plate 2 separates an inner cavity of the housing 1 into a purification chamber and an equipment chamber, and the purification chamber and the equipment chamber are independently separated by the partition plate 2, so that dust in the purification chamber is prevented from entering the equipment chamber;

a dust purification part 3 and a dust collection part 4 are arranged in the purification chamber, and a circuit element 5 and a circuit board 6 are arranged in the equipment chamber, wherein the circuit element 5 is arranged on the circuit board 6, and the circuit element 5 is connected with the dust purification part 3 through a lead;

circuit component 5 is arranged in controlling dust in the dust purification part 3 and gets rid of the air to collect the dust after 4 unified storages filter through dust, use through both cooperations, with absorbent filtration in the clarifier, thereby the dust is filtered down, then collects the dust again, accomplishes and handles the dust, thereby avoids the dust to jam filterable equipment for a long time, influences its result of use.

The dust purification component 3 comprises a discharge electrode 31, an electrode frame 32, a fan 33, an air inlet 34, an air outlet 35, a motor 36 and a fan shaft 37, wherein the discharge electrode 31 is arranged on the electrode frame 32;

the air inlet 34 and the air outlet 35 are symmetrically arranged at two sides of the housing 1, the motor 36 is connected with the fan 33 through a fan shaft 37, the fan 33 is arranged at the air outlet 35, the discharge electrode 31 is arranged on a connecting line of the centers of the circles of the air inlet 34 and the air outlet 35, wherein the motor 36 drives the fan 33 to rotate through the fan shaft 37, so that the negative pressure generated by the fan 33 sucks the surrounding air from the air inlet 34, and the air is purified in the middle and then discharged from the air outlet 35.

The discharge electrode 31 is a cylindrical metal bare electrode with a diameter of 1 cm.

The dust collecting part 4 comprises a dust collecting box 41, a dust blocking net 42, a buffer frame 43 and a buffer spring 44, wherein the dust blocking net 42 is arranged in the purification chamber and divides the purification chamber, the air inlet 34 and the air outlet 35 are respectively positioned at two sides of the dust blocking net 42, the dust blocking net 42 is used for preliminarily blocking dust in the air, and adsorption carbon used for purification and deodorization is adhered on the dust blocking net 42, so that part of impurities in the air are adsorbed;

the dust collecting box 41 is positioned on the bottom wall of the shell 1 below the discharge electrode 31, and the bottom edge of the dust blocking net 42 is contacted with the edge of the dust collecting box 41, so that dust can fall into the dust collecting box 41;

buffering frame 43 is fixed on the both ends of electrode holder 32, and buffering frame 43 passes through buffer spring 44 and shell 1 inner wall connection, and buffer spring 44 plays the cushioning effect when being used for the vibration, avoids on vibration transmission to shell 1, leads to equipment to rock.

Be equipped with vibration subassembly 7 on the dirt net 42, vibration subassembly 7 includes vibrating arm 71, vibrating motor 72 and vibration frame 73, vibration frame 73 sets up on dirt net 42, vibrating motor 72 passes through the bolt and installs on the bottom of vibration frame 73, and vibrating arm 71 that connects on the vibrating motor 72 is connected with the top of dirt net 42, the top and the bottom that drive dirt net 42 through the vibration frame 73 that sets up drive vibrating arm 71 shake, thereby shake the last adsorbed dust of dirt net 42, fall in dust collection box 41, accomplish unified collection and handle.

The circuit element 5 comprises a lithium ion battery 51, a mechanical switch 52, a voltage reduction module 53, a direct current high voltage pack 54, a charging module 55 and a hardware system module, wherein the lithium ion battery 51 and the charging module 55 are arranged at the lower end of the equipment cavity, the lithium ion battery 51 is electrically connected with the charging module 55, and the voltage reduction module 53 is respectively connected with the motor 36, the lithium ion battery 51 and the mechanical switch 52 through leads.

The voltage of the voltage reduction module 53 is 5V, and the negative direct-current high voltage output by the direct-current high-voltage package 54 is-6 kV.

The voltage of the voltage reduction module 53 is 5V, and the lithium ion battery 51 acts on the direct current high voltage package 54 through the voltage reduction module 53, so that the voltage of the direct current high voltage package 54 is kept at-6 kV, and the arc discharge phenomenon is not easy to generate. In addition, the negative high voltage of the dc high voltage pack 54 increases the concentration of plasma, enhances the charge power of dust particles, and the charged dust particles move in a single direction toward the discharge electrode 31, thereby enhancing the dust removal strength.

The hardware system module comprises a MOSFET (metal oxide semiconductor field effect transistor) 56, a pulse signal generator, a ZVS (zero voltage switching) module 58 and a high-frequency high-voltage transformer 59, wherein the anode and the cathode of the discharge electrode 31 are respectively connected with the high-frequency high-voltage transformer 59 and the voltage reduction module 53, and the high-frequency high-voltage transformer 59 is respectively connected with the ZVS module 58 and the voltage reduction module 53;

the direct current high voltage package 54, the pulse signal generator, the ZVS module 58, the discharge electrode 31, the lithium ion battery 51 and the mechanical switch 52 are connected through wires.

The pulse signal frequency of the pulse signal generator is 200Hz, the duty ratio is 0-1, the square wave direct current voltage is 15V, the output pulse frequency of the ZVS module 58 is 20kHz, the working voltage is 55V-30V direct current, the transformation ratio of the high-frequency high-voltage transformer 59 is 1: 100.

the charging module 55 can charge the lithium ion battery 51, the lithium ion battery 51 drives the ZVS module 58 and the voltage reduction module 53, the primary winding of the high-frequency high-voltage transformer 59 is connected with the ZVS module 58, one end of the secondary winding is connected with the direct-current high-voltage package 54, the other end of the secondary winding is connected with the discharge electrode 31, the alternating current output by the ZVS module 58 is boosted by the high-frequency high-voltage transformer 59, and then is superposed with the negative direct-current high voltage output by the direct-current high-voltage package 54, and then acts on the discharge electrode 31 to ionize air molecules by gas discharge to generate a large amount of plasmas, wherein the plasmas mainly exist in the form of electrons and ions, and the plasmas move towards two poles under the action of an electric field force and collide with dust particles in air flow in the moving process, and the electrons and the ions can be attached to the surface of dust. The negatively charged dust inevitably moves toward the positive electrode of the discharge electrode 31, and a small portion of the dust that fails to capture electrons is electrically neutral. In a non-uniform strong electric field, the electrically neutral dusts can generate a polarization effect, so that the side of the positive electrode close to the discharge electrode 31 is charged with negative charges, the side far away from the positive electrode is polarized with positive charges, and the charged dusts and the polarized dusts are finally moved and captured, thereby the device has a very obvious dust removal effect.

In conclusion; the invention relates to an AC/DC enhanced discharge plasma air purifier, which solves the problem that the surface of a filter element or a dust collecting plate is not easy to clean and affects the purification effect, a pulse signal generator generates a DC square wave signal to drive an MOSFET (metal-oxide-semiconductor field effect transistor) tube (56), the pulse signal input is high level, the MOSFET tube (56) is switched on, the pulse signal input is low level, the MOSFET tube (56) is switched off, when the MOSFET tube (56) is in a switching-on state, the AC voltage output by a ZVS (zero voltage switch) module (58) is boosted by a high-frequency high-voltage transformer (59) and then superposed with the negative DC high voltage output by a DC high-voltage packet (54) and then acts on a discharge electrode (31), a lithium ion battery (51) acts on the DC high-voltage packet (54) through a voltage reduction module (53), the DC high-voltage packet (54) generates negative DC high voltage, one end of a secondary winding of the high-frequency high-voltage transformer (59) is connected with the negative DC high voltage, the other end is connected with an inner conductor of the electrode, and the generated pulse enables the electrode to vibrate, shaking off the dust to achieve the self-cleaning effect of the electrode; on the other hand, the pulse alternating current composite direct current negative high voltage discharge is equivalent to a discharge form of corona discharge and DBD composite, the discharge intensity is higher than that of a single discharge, the concentration of plasma is increased, charged particles are increased, the charged particles are attached to the surfaces of dust particles in the moving process, the number of charged dust particles is increased, alternating current is arranged on the discharge electrode 31, a back corona layer can be generated by the alternating current, oil-contaminated substances are prevented from falling on the discharge electrode 31, the dust removal strength is enhanced, finally, the voltage of the voltage reduction module 53 is 5V, the lithium ion battery 51 acts on the direct current high voltage package 54 through the voltage reduction module 53, the voltage of the direct current high voltage package 54 is kept at-6 kV, and therefore the arc discharge phenomenon is not easy to generate; in addition, the negative high voltage of the dc high voltage pack 54 increases the concentration of plasma, enhances the charge power of dust particles, and makes the charged dust particles move in a single direction toward the discharge electrode 31, thereby enhancing the dust removal strength.

The above description is only for the preferred embodiment of the present invention, but the scope of the present invention is not limited thereto, and any person skilled in the art should be able to cover the technical solutions and the inventive concepts of the present invention within the technical scope of the present invention.

Claims

1. An alternating current-direct current enhanced discharge plasma air purifier is characterized by comprising a shell (1) and a partition plate (2) arranged inside the shell, wherein the partition plate (2) divides an inner cavity of the shell (1) into a purification chamber and an equipment chamber;

a dust purification part (3) and a dust collection part (4) are arranged in the purification cavity, a circuit element (5) and a circuit board (6) are arranged in the equipment cavity, wherein the circuit element (5) is installed on the circuit board (6), and the circuit element (5) is connected with the dust purification part (3) through a lead;

the circuit component (5) is used for controlling the dust purifying part (3) to remove dust in the air and uniformly storing the filtered dust through the dust collecting part (4).

2. The ac/dc enhanced discharge plasma air cleaner according to claim 1, wherein the dust cleaning part (3) comprises a discharge electrode (31), an electrode holder (32), a fan (33), an air inlet (34), an air outlet (35), a motor (36) and a fan shaft (37), the discharge electrode (31) is disposed on the electrode holder (32);

the air inlet (34) and the air outlet (35) are symmetrically arranged on two sides of the shell (1), the motor (36) is connected with the fan (33) through the fan shaft (37), the fan (33) is arranged on the air outlet (35), and the discharge electrode (31) is arranged on a connecting line of the circle centers of the air inlet (34) and the air outlet (35).

3. The ac-dc enhanced discharge plasma air cleaner according to claim 2, wherein the discharge electrode (31) is a cylindrical bare metal electrode having a diameter of 1 cm.

4. The ac/dc enhanced discharge plasma air cleaner according to claim 1, wherein the dust collecting part (4) comprises a dust collecting box (41), a dust blocking net (42), a buffer frame (43), and a buffer spring (44), wherein the dust blocking net (42) is disposed in the cleaning chamber and partitions the cleaning chamber, and wherein the air inlet (34) and the air outlet (35) are respectively located at both sides of the dust blocking net (42);

the dust collecting box (41) is positioned on the bottom wall of the shell (1) below the discharge electrode (31), and the bottom edge of the dust blocking net (42) is contacted with the edge of the dust collecting box (41);

the buffer frames (43) are fixed at two ends of the electrode frame (32), and the buffer frames (43) are connected with the inner wall of the shell (1) through buffer springs (44).

5. The ac/dc enhanced discharge plasma air cleaner according to claim 1, wherein the dust-shielding mesh (42) is provided with a vibration assembly (7), the vibration assembly (7) comprises a vibration rod (71), a vibration motor (72) and a vibration frame (73), the vibration frame (73) is disposed on the dust-shielding mesh (42), the vibration motor (72) is mounted on the bottom end of the vibration frame (73) through bolts, and the vibration rod (71) connected to the vibration motor (72) is connected to the top end of the dust-shielding mesh (42).

6. The ac/dc enhanced discharge plasma air purifier according to claim 1, wherein the circuit element (5) comprises a lithium ion battery (51), a mechanical switch (52), a voltage reduction module (53), a dc high voltage pack (54), a charging module (55) and a hardware system module, the lithium ion battery (51) and the charging module (55) are disposed at the lower end of the equipment chamber, the lithium ion battery (51) and the charging module (55) are electrically connected, and the voltage reduction module (53) is connected with the motor (36), the lithium ion battery (51) and the mechanical switch (52) through wires.

7. The AC/DC enhanced discharge plasma air purifier as recited in claim 5, wherein the voltage of the voltage reduction module (3) is 5V, and the negative DC high voltage output by the DC high voltage pack (4) is-6 kV.

8. The ac-dc enhanced discharge plasma air cleaner according to claim 5, wherein the hardware system module comprises a MOSFET tube (56), a pulse signal generator, a ZVS module (58) and a high frequency high voltage transformer (59), the positive and negative electrodes of the discharge electrode (31) are respectively connected with the high frequency high voltage transformer (59) and the voltage reduction module (53), wherein the high frequency high voltage transformer (59) is respectively connected with the ZVS module (58) and the voltage reduction module (53);

the direct-current high-voltage pack 54, the pulse signal generator, the ZVS module (58), the discharge electrode (31), the lithium ion battery (51) and the mechanical switch (52) are connected through leads respectively.

9. The AC/DC enhanced discharge plasma air purifier as recited in any one of claim 8, wherein the pulse signal frequency of the pulse signal generator is 200Hz, the duty ratio is 0-1, the square wave DC voltage is 15V, the output pulse frequency of the ZVS module (58) is 20kHz, the working voltage is 55V-30V, the transformation ratio of the high-frequency high-voltage transformer (59) is 1: 100.