An AC / DC enhanced discharge plasma air purifier

Abstract

The present invention discloses an AC / DC enhanced discharge plasma air purifier, which belongs to the technical field of air purifiers, and includes a shell and a partition arranged inside, wherein the partition separates the inner cavity of the shell into a purification chamber and an equipment chamber; a dust purification component and a dust collection component are arranged in the purification chamber, and a circuit element and a circuit board are arranged in the equipment chamber, wherein the circuit element is mounted on the circuit board, and the circuit element and the dust purification component are connected by a wire. The AC / DC enhanced discharge plasma air purification proposed by the present invention generates a pulse to vibrate the electrode, shake off the dust, and achieve the effect of electrode self-cleaning; there is an alternating current on the discharge electrode, and the alternating current can generate a back corona layer to prevent oily substances from falling on the discharge electrode, thereby enhancing the dust removal strength; the charged dust particles are made to move unidirectionally toward the discharge electrode 31, thereby enhancing the dust removal strength.

Description

Technical Field

[0001] The invention relates to the technical field of purifiers, and in particular to an AC / DC enhanced discharge plasma air purifier. Background Art

[0002] An air purifier refers to a product that can absorb, decompose or transform various air pollutants (generally including PM2.5, dust, pollen, odor, decoration pollution such as formaldehyde, bacteria, allergens, etc.), which can effectively improve the cleanliness of the air and is mainly used in indoor environments such as homes, offices, and shopping malls. Electrostatic dust removal is a method of gas dust removal. Its working principle is to use a high-voltage electrostatic field to generate corona discharge, so that the air molecules in the electric field are ionized and collide with dust particles to charge the suspended dust particles; under the action of the electric field force, the charged dust particles move toward the electrode plate with the opposite polarity to their own, thereby separating the suspended dust particles from the gas and capturing them at the electrode plate. If the electrode plate works for a long time without regular cleaning, it will affect the dust collection efficiency, and the risk of arcing will also be greatly increased. Therefore, it is necessary to manually (or with the help of specific tools) clean the dust collecting plate regularly, and the disassembly and assembly work is troublesome. The air purifiers currently available on the market are generally large in size and weight, occupy a large space, and can only be placed on the ground or hung on a specific location on the wall. They cannot be flexibly placed according to the distribution of indoor space, so there are certain usage restrictions for small rooms.

[0003] The Chinese patent "An Electrostatic Precipitator" (application number: 201910872092.5, authorization publication number: CN(51)0479488A, authorization publication date: 2019.(51).22) discloses an electrostatic precipitator, which achieves the effect of electrostatic dust collection by applying high voltage direct current between composite dust collection membranes connected to different electrodes. However, this dust collection method has the risk of arcing, and does not have a dust cleaning and dust removal device for cleaning electrodes and preventing secondary dust, which affects the efficiency of dust collection.

[0004] The Chinese patent "Air Purifier" (application number: 202010184486.4, authorization publication number: CN(51)5550267A, authorization publication date: 2020.06.09) discloses an air purifier, which uses the plasma field around the generating pole winding to ionize the air molecules flowing through and carry positive charges. The ionized air molecules are then accelerated under the action of the electric field force to collide with other particles and make other particles and dust and bacteria passing through the electric field carry charges. Finally, pollutants such as bacteria and dust are adsorbed by the dust collecting impeller. However, the impeller needs to be disassembled for cleaning. On the one hand, disassembly and installation are more troublesome. On the other hand, after a period of use, the connection of the blades will become loose due to frequent disassembly and assembly, and need to be repaired, thereby shortening the service life of the purifier.

[0005] The Chinese patent "Air Purifier" (application number: 202020928864.0, authorization publication number: CN 255619051U, authorization publication date: 2021.02.26) discloses an air purifier with autonomous filter cleaning and air humidification functions, so that air purification and air humidification can be carried out at the same time, but its size is large, it occupies more space, and it is inconvenient to move, resulting in certain limitations on its scope of use.

[0006] Therefore, how to create an air purification device with no arcing risk, self-cleaning of dust adsorbed by electrodes, simple structure and easy to carry is a problem that needs to be solved urgently; based on this, the present invention designs an AC / DC enhanced discharge plasma air purifier to solve the above problems, and the device also has the advantages of energy saving and environmental protection, low cost, simple operation, high reliability and small size. Summary of the invention

[0007] The object of the present invention is to provide an AC / DC enhanced discharge plasma air purifier to solve the problems raised in the above background technology.

[0008] To achieve the above object, the present invention provides the following technical solution: an AC / DC enhanced discharge plasma air purifier, comprising a housing and a partition disposed inside, wherein the partition separates the inner cavity of the housing into a purification chamber and an equipment chamber;

[0009] The purification chamber is provided with a dust purification component and a dust collection component, and the equipment chamber is provided with a circuit element and a circuit board, wherein the circuit element is mounted on the circuit board, and the circuit element and the dust purification component are connected by a wire;

[0010] The circuit element is used to control the dust purification component to remove dust from the air, and to uniformly store the filtered dust through the dust collection component.

[0011] Further, the dust purification component includes a discharge electrode, an electrode frame, a fan, an air inlet, an air outlet, a motor and a fan shaft, and the discharge electrode is arranged on the electrode frame;

[0012] The air inlet and the air outlet are symmetrically arranged on both sides of the shell, and the motor is connected to the fan through the fan shaft. The fan is arranged at the air outlet, and the discharge electrode is placed on the line connecting the centers of the air inlet and the air outlet.

[0013] Furthermore, the discharge electrode is a cylindrical metal bare electrode with a diameter of 1 cm.

[0014] Further, the dust collection component includes a dust collection box, a dust screen, a buffer frame and a buffer spring, wherein the dust screen is arranged in the purification chamber and separates the purification chamber, wherein the air inlet and the air outlet are respectively located on both sides of the dust screen;

[0015] The dust collecting box is located on the bottom wall of the housing below the discharge electrode, and the bottom edge of the dust shielding net contacts the edge of the dust collecting box;

[0016] The buffer frame is fixed on both ends of the electrode frame, and the buffer frame is connected to the inner wall of the shell through a buffer spring.

[0017] Furthermore, a vibration assembly is provided on the dust screen, and the vibration assembly includes a vibration rod, a vibration motor and a vibration frame. The vibration frame is arranged on the dust screen, the vibration motor is installed on the bottom end of the vibration frame by bolts, and the vibration rod connected to the vibration motor is connected to the top end of the dust screen.

[0018] Furthermore, the circuit elements include a lithium-ion battery, a mechanical switch, a step-down module, a DC high-voltage package, 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 chamber, and the lithium-ion battery and the charging module are electrically connected. The step-down module is connected to the motor, the lithium-ion battery and the mechanical switch respectively through wires.

[0019] Furthermore, the voltage of the step-down module is 5V, and the negative DC high voltage output by the DC high voltage package is -6kV.

[0020] Furthermore, the hardware system module includes a MOSFET tube, a pulse signal generator, a ZVS module and a high-frequency high-voltage transformer, and the positive and negative electrodes of the discharge electrode are respectively connected to the high-frequency high-voltage transformer and the step-down module, wherein the high-frequency high-voltage transformer is respectively connected to the ZVS module and the step-down module;

[0021] The DC high voltage package, the pulse signal generator, the ZVS module, the discharge electrode, the lithium ion battery and the mechanical switch are connected respectively through wires.

[0022] Furthermore, the pulse signal frequency of the pulse signal generator is 200Hz, the duty cycle is 0-1, the square wave DC voltage is 15V, the ZVS module output pulse frequency is 20kHz, the working voltage is DC 55V-30V, and the transformation ratio of the high-frequency high-voltage transformer is 1:100.

[0023] Compared with the prior art, the present invention has the following beneficial effects:

[0024] 1. The present invention proposes an AC / DC enhanced discharge plasma air purification, in which the lithium-ion battery acts on the DC high-voltage package through the step-down module, and the DC high-voltage package generates negative DC high voltage. One end of the secondary winding of the high-frequency high-voltage transformer is connected in series with the negative DC high voltage, and the other end is connected to the inner conductor of the electrode. The generated pulse makes the electrode vibrate, shakes off the dust, and achieves the effect of electrode self-cleaning;

[0025] 2. The invention proposes an AC / DC enhanced discharge plasma air purification, pulse AC composite DC negative high voltage discharge, which is equivalent to the discharge form of corona discharge and DBD composite, with greater discharge intensity than a single discharge, increasing the concentration of plasma, increasing the number of charged particles, and the charged particles adhere to the surface of dust particles during movement, increasing the number of charged dust particles, and there is AC on the discharge electrode, which can avoid the generation of a back corona layer, preventing oily substances from falling on the discharge electrode, thereby enhancing the dust removal strength;

[0026] 3. In the AC / DC enhanced discharge plasma air purification proposed by the present invention, the voltage of the DC high-voltage package is maintained at -6kV, so that arcing is not easily generated; in addition, the negative high voltage of the DC high-voltage package increases the concentration of plasma, enhances the charge of dust particles, and makes the charged dust particles move unidirectionally toward the discharge electrode 31, thereby enhancing the dust removal force. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] Figure 1 It is the circuit principle diagram of the present invention;

[0028] Figure 2 It is the overall structure diagram of the present invention;

[0029] Figure 3 It is the internal partial structure diagram of the present invention;

[0030] Figure 4 This is a diagram of the dust screen partition structure of the present invention;

[0031] Figure 5 The dust screen and the partition board of the present invention are removed from the structure diagram;

[0032] Figure 6 For the present invention Figure 5 Enlarged view of point A.

[0033] In the figure: 1. shell; 2. partition; 3. dust purification component; 31. discharge electrode; 32. electrode frame; 33. fan; 34. air inlet; 35. air outlet; 36. motor; 37. fan shaft; 4. dust collection component; 41. dust collection box; 42. dust screen; 43. buffer frame; 44. buffer spring; 5. circuit element; 51. lithium-ion battery; 52. mechanical switch; 53. step-down module; 54. DC high-voltage package; 55. charging module; 56. MOSFET tube; 58. ZVS module; 59. high-frequency high-voltage transformer; 6. circuit board; 7. vibration component; 71. vibration rod; 72. vibration motor; 73. vibration frame. DETAILED DESCRIPTION

[0034] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0035] See also Figure 1-6 An AC / DC enhanced discharge plasma air purifier comprises a housing 1 and a partition 2 arranged inside, wherein the partition 2 separates the 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 2, thereby preventing dust in the purification chamber from entering the equipment chamber;

[0036] A dust purification component 3 and a dust collection component 4 are provided in the purification chamber, and a circuit element 5 and a circuit board 6 are provided in the equipment chamber, wherein the circuit element 5 is mounted on the circuit board 6, and the circuit element 5 is connected to the dust purification component 3 through a wire;

[0037] The circuit element 5 is used to control the dust purification component 3 to remove dust from the air, and the dust collecting component 4 uniformly stores the filtered dust. By using the two together, the air adsorbed in the purifier is filtered, so that the dust is screened out, and then the dust is collected to complete the dust processing, thereby preventing the dust from clogging the filtering equipment for a long time and affecting its use effect.

[0038] The dust purification component 3 includes 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, and the discharge electrode 31 is arranged on the electrode frame 32;

[0039] The air inlet 34 and the air outlet 35 are symmetrically arranged on both sides of the housing 1, and the motor 36 is connected to the fan 33 through the fan shaft 37. The fan 33 is arranged at the air outlet 35, and the discharge electrode 31 is placed on the line connecting the centers of the air inlet 34 and the air outlet 35. 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 discharges it from the air outlet 35 after intermediate purification.

[0040] The discharge electrode 31 is a cylindrical metal bare electrode with a diameter of 1 cm.

[0041] The dust collecting component 4 includes a dust collecting box 41, a dust screen 42, a buffer frame 43 and a buffer spring 44, wherein the dust screen 42 is arranged in the purification chamber and separates the purification chamber, wherein the air inlet 34 and the air outlet 35 are respectively located on both sides of the dust screen 42, wherein the dust screen 42 is used to initially block dust in the air, and adsorption carbon for purification and deodorization is adhered to the dust screen 42, thereby adsorbing some impurities in the air;

[0042] The dust collecting box 41 is located on the bottom wall of the housing 1 below the discharge electrode 31, and the bottom edge of the dust shielding net 42 contacts the edge of the dust collecting box 41, ensuring that dust can fall into the dust collecting box 41;

[0043] The buffer frame 43 is fixed on both ends of the electrode frame 32. The buffer frame 43 is connected to the inner wall of the shell 1 through the buffer spring 44. The buffer spring 44 is used to play a buffering role during vibration to prevent the vibration from being transmitted to the shell 1 and causing the device to shake.

[0044] A vibration assembly 7 is provided on the dust shield net 42, and the vibration assembly 7 includes a vibration rod 71, a vibration motor 72 and a vibration frame 73. The vibration frame 73 is arranged on the dust shield net 42, and the vibration motor 72 is installed on the bottom end of the vibration frame 73 by bolts, and the vibration rod 71 connected to the vibration motor 72 is connected to the top end of the dust shield net 42. The vibration frame 73 drives the vibration rod 71 to drive the top and bottom of the dust shield net 42 to shake, so that the dust adsorbed on the dust shield net 42 is shaken off and falls into the dust collection box 41, completing unified collection and processing.

[0045] The circuit element 5 includes a lithium-ion battery 51, a mechanical switch 52, a step-down module 53, a DC high-voltage package 54, a charging module 55 and a hardware system module. The lithium-ion battery 51 and the charging module 55 are arranged at the lower end of the equipment chamber, and the lithium-ion battery 51 and the charging module 55 are electrically connected. The step-down module 53 is connected to the motor 36, the lithium-ion battery 51 and the mechanical switch 52 respectively through wires.

[0046] The voltage of the step-down module 53 is 5V, and the negative DC high voltage output by the DC high voltage package 54 is -6kV.

[0047] The voltage of the step-down module 53 is 5V, and the lithium-ion battery 51 acts on the DC high-voltage package 54 through the step-down module 53, so that the voltage of the DC high-voltage package 54 is maintained at -6kV, so that arcing is not easily generated. In addition, the negative high voltage of the DC high-voltage package 54 increases the concentration of plasma and enhances the charge of dust particles. The charged dust particles move unidirectionally toward the discharge electrode 31, thereby enhancing the dust removal force.

[0048] The hardware system module includes 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 to the high-frequency high-voltage transformer 59 and the step-down module 53, wherein the high-frequency high-voltage transformer 59 is respectively connected to the ZVS module 58 and the step-down module 53;

[0049] The DC 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 to each other through wires.

[0050] The pulse signal frequency of the pulse signal generator is 200Hz, the duty cycle is 0-1, the square wave DC voltage is 15V, the ZVS module 58 outputs a pulse frequency of 20kHz, the operating voltage is DC 55V-30V, and the transformation ratio of the high-frequency high-voltage transformer 59 is 1:100.

[0051] The charging module 55 can charge the lithium-ion battery 51, and the lithium-ion battery 51 drives the ZVS module 58 and the step-down module 53. The primary winding of the high-frequency high-voltage transformer 59 is connected to the ZVS module 58, one end of the secondary winding is connected to the DC high-voltage package 54, and the other end is connected to the discharge electrode 31. The alternating current output by the ZVS module 58 is increased by the high-frequency high-voltage transformer 59, and then superimposed with the negative DC high voltage output by the DC high-voltage package 54, and then acts on the discharge electrode 31, using gas discharge to ionize air molecules and generate a large amount of plasma. These plasmas mainly exist in the form of electrons and ions. Under the action of the electric field force, they move toward the two poles. During the movement, they encounter dust particles in the airflow, and these electrons and ions will adhere to the dust surface. Negatively charged dust must move toward the positive electrode direction of the discharge electrode 31, and the small amount of dust that fails to capture electrons is electrically neutral. In an uneven strong electric field, these electrically neutral dust particles will experience a polarization effect, causing them to carry a negative charge on the positive electrode side close to the discharge electrode 31, and polarize to a positive charge on the side away from the positive electrode. The charged dust and polarized dust will eventually move and be captured, so that the device has a very obvious dust removal effect.

[0052] In summary, the AC / DC enhanced discharge plasma air purifier of the present invention solves the problem that dust accumulated on the surface of the filter element or dust collecting plate is difficult to clean and affects the purification effect. The pulse signal generator generates a DC square wave signal to drive the MOSFET tube 56 (the pulse signal input is high level, the MOSFET tube 56 is turned on, and the pulse signal input is low level, the MOSFET tube 56 is turned off). When the MOSFET tube 56 is in the on state, the AC voltage output by the ZVS module 58 is increased by the high-frequency high-voltage transformer 59, and then superimposed with the negative DC high voltage output by the DC high-voltage package 54, and then acts on the discharge electrode 31. The lithium-ion battery 51 acts on the DC high-voltage package 54 through the step-down module 53, and the DC high-voltage package 54 generates negative DC high voltage. One end of the secondary winding of the high-frequency high-voltage transformer 59 is connected in series with the negative DC high voltage, and the other end is connected to the inner conductor of the electrode. The pulse generated causes the electrode to vibrate, shake off the dust, and achieve the effect of electrode self-cleaning. On the other hand, the pulse AC composite DC negative high voltage discharge is equivalent to the discharge form of corona discharge and DBD composite, which is better than single The discharge intensity is large, which increases the concentration of plasma and increases the number of charged particles. The charged particles adhere to the surface of dust particles during movement, which increases the number of charged dust particles. There is alternating current on the discharge electrode 31. Alternating current can avoid the generation of a back corona layer and prevent oil and dirt from falling on the discharge electrode 31, thereby enhancing the dust removal effect. Finally, the voltage of the step-down module 53 is 5V, and the lithium-ion battery 51 acts on the DC high-voltage package 54 through the step-down module 53, so that the voltage of the DC high-voltage package 54 is maintained at -6kV, so that arcing is not easily generated; in addition, the negative high voltage of the DC high-voltage package 54 increases the concentration of plasma, enhances the charge of dust particles, and causes the charged dust particles to move unidirectionally toward the discharge electrode 31, thereby enhancing the dust removal effect.

[0053] The above description is only a preferred specific implementation manner of the present invention, but the protection scope of the present invention is not limited thereto. Any technician familiar with the technical field can make equivalent replacements or changes according to the technical scheme and inventive concept of the present invention within the technical scope disclosed by the present invention, which should be covered by the protection scope of the present invention.

Claims

1. An AC / DC enhanced discharge plasma air purifier, characterized in that: It comprises a shell (1) and a partition (2) arranged inside, wherein the partition (2) separates the inner cavity of the shell (1) into a purification chamber and an equipment chamber; The purification chamber is provided with a dust purification component (3) and a dust collection component (4), and the equipment chamber is provided with a circuit element (5) and a circuit board (6), wherein the circuit element (5) is mounted on the circuit board (6), and the circuit element (5) and the dust purification component (3) are connected via a wire; The circuit element (5) is used to control the dust purification component (3) to remove dust from the air, and to uniformly store the filtered dust through the dust collection component (4); The dust collecting component (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, wherein the air inlet (34) and the air outlet (35) are respectively located on both sides of the dust blocking net (42); The dust collecting box (41) is located on the bottom wall of the housing (1) below the discharge electrode (31), and the bottom edge of the dust shielding net (42) is in contact with the edge of the dust collecting box (41); The buffer frame (43) is fixed on both ends of the electrode frame (32), and the buffer frame (43) is connected to the inner wall of the housing (1) through a buffer spring (44); a vibration assembly (7) is provided on the dust screen (42), and the vibration assembly (7) comprises a vibration rod (71), a vibration motor (72) and a vibration frame (73); the vibration frame (73) is arranged on the dust screen (42), the vibration motor (72) is installed 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 screen (42); The circuit element (5) comprises a lithium-ion battery (51), a mechanical switch (52), a voltage reduction module (53), a DC high-voltage package (54), a charging module (55) and a hardware system module. The lithium-ion battery (51) and the charging module (55) are arranged at the lower end of the equipment chamber, and the lithium-ion battery (51) and the charging module (55) are electrically connected. The voltage reduction module (53) is connected to the motor (36), the lithium-ion battery (51) and the mechanical switch (52) respectively through wires. The hardware system module includes a MOSFET tube (56), a pulse signal generator, a ZVS module (58) and a high-frequency high-voltage transformer (59), wherein the positive and negative electrodes of the discharge electrode (31) are respectively connected to the high-frequency high-voltage transformer (59) and the step-down module (53), wherein the high-frequency high-voltage transformer (59) is respectively connected to the ZVS module (58) and the step-down module (53); The DC 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 respectively via wires; 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 on both sides of the housing (1), and the motor (36) is connected to the fan (33) via a fan shaft (37). The fan (33) is arranged at the air outlet (35), and the discharge electrode (31) is placed on a line connecting the centers of the air inlet (34) and the air outlet (35).

2. The AC / DC enhanced discharge plasma air purifier according to claim 1, characterized in that: The discharge electrode (31) is a cylindrical metal bare electrode with a diameter of 1 cm.

3. The AC / DC enhanced discharge plasma air purifier according to claim 2, characterized in that: The voltage of the step-down module (53) is 5V, and the negative DC high voltage output by the DC high voltage package (54) is -6kV.

4. The AC / DC enhanced discharge plasma air purifier according to claim 3, characterized in that: The pulse signal frequency of the pulse signal generator is 200 Hz, the duty cycle is 0-1, the square wave DC voltage is 15V, the ZVS module (58) outputs a pulse frequency of 20kHz, the operating voltage is DC 55V-30V, and the transformation ratio of the high-frequency high-voltage transformer (59) is 1:100.

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