CN113042215B

CN113042215B - Electrode assembly, discharge unit, purification device and air purifier

Info

Publication number: CN113042215B
Application number: CN202110394109.8A
Authority: CN
Inventors: 董双幸; 曾焕雄; 王墅; 赵勇; 肖德玲; 贾林虎
Original assignee: Gree Electric Appliances Inc of Zhuhai
Current assignee: Gree Electric Appliances Inc of Zhuhai
Priority date: 2021-04-13
Filing date: 2021-04-13
Publication date: 2024-12-24
Anticipated expiration: 2041-04-13
Also published as: CN113042215A

Abstract

The invention relates to the technical field of air purifiers, in particular to an electrode assembly, a discharge unit, a purifying device and an air purifier. The electrode assembly comprises a first electrode, an insulating medium layer and a second electrode, wherein the first electrode is of a plate-shaped structure and is bent to form at least one accommodating space, an opening is formed in the accommodating space, the insulating medium layer is wrapped on the surface of the first electrode, and the second electrode is arranged in the accommodating space and is attached to the inner wall of the accommodating space. The electrode assembly provided by the invention has the advantages that plasma generated by discharge is more concentrated, and the sterilization and purification efficiency is higher.

Description

Electrode assembly, discharge unit, purification device and air purifier

Technical Field

The invention relates to the technical field of air purifiers, in particular to an electrode assembly, a discharge unit, a purifying device and an air purifier.

Background

With the increasing environmental problems, the pollutants in the air pose a health threat to people, and the air purifier gradually becomes a living necessity for people.

The purification principle of the air purifier is various, and generally comprises an air filtration method, an ultraviolet disinfection method, an ozone disinfection method, a fumigation method and a plasma air sterilization purification technology. The air filtration method generally adopts a high-efficiency filter screen to filter PM2.5 particles, but the filter equipment has high investment cost and high maintenance cost, the ultraviolet disinfection and ozone disinfection have general inactivating effect on mould, the fumigation disinfection method generally heats disinfectant or adds oxidant to generate gas for disinfection, but chemical reagents used in the fumigation method have toxicity, have great harm to human bodies and require longer ventilation time after disinfection.

The plasma air sterilization and purification technology is a technology capable of efficiently and conveniently destroying and decomposing pollutants, is receiving more attention from various nationalities, and is a high-tech technology with development prospect in the field of environmental pollution treatment. The plasma air sterilizing and purifying technology is to produce high voltage discharge to break down air in gas phase environment to form plasma environment, and to utilize the collision of electrons and ions in plasma and gas molecules in air to produce chain chemical reaction to make the pollutant in gas migrate, convert and harmless.

In the related art, a pole plate structure, a sterilization device and an air purifier are provided, wherein the pole plate structure comprises a first electrode, a second electrode and a dielectric layer, the first electrode is in a plate-shaped structure or a columnar structure, the second electrode is in a net-shaped structure and is arranged in parallel with the first electrode or is wound around the first electrode, the dielectric layer is arranged between the first electrode and the second electrode, and the dielectric layer is made of electret materials. The second electrode is arranged in parallel with the plate-shaped first electrode, or the second electrode is wound around the columnar first electrode, so that plasma is easy to diffuse, stable plasma cannot be generated, and the sterilizing and purifying efficiency is low.

Disclosure of Invention

Therefore, the technical problem to be solved by the invention is to overcome the defect of low sterilization and purification efficiency in the prior art, thereby providing an electrode assembly, a discharge unit, a purification device and an air purifier with high sterilization and purification efficiency.

In order to solve the above technical problems, the present invention provides an electrode assembly comprising:

the first electrode is constructed into a plate-shaped structure and is bent to form at least one accommodating space, and an opening is formed in the accommodating space;

the insulating medium layer is wrapped on the surface of the first electrode;

And the second electrode is arranged in the accommodating space and is attached to the inner wall of the accommodating space.

According to the electrode assembly provided by the invention, the accommodating space is an arc-shaped groove, and the notch of the arc-shaped groove is the opening.

According to the electrode assembly provided by the invention, the first electrode is bent to form the two arc-shaped grooves which are arranged in an S shape, and the openings of the two arc-shaped grooves face opposite directions.

The electrode assembly provided by the invention has the advantages that the first electrode is made of a conductive material, the second electrode is a carbon fiber bundle, and at least part of carbon fibers of the carbon fiber bundle are attached to the outside of the insulating medium layer.

The present invention also provides a discharge cell comprising:

a support structure;

and the electrode assemblies are rotatably connected with the supporting structure.

The discharge unit provided by the invention further comprises:

A first connecting column having one end connected to one end of the electrode assembly and the other end rotatably connected to the support structure;

And one end of the second connecting column is connected with the other end of the electrode assembly, and the other end of the second connecting column is rotatably connected with the supporting structure.

The invention provides a discharge unit, wherein the support structure comprises a first conductive support column and a second conductive support column which are arranged in parallel, the other end of the first connection column is rotatably connected with the first conductive support column, and the other end of the second connection column is rotatably connected with the second conductive support column.

According to the discharge unit provided by the invention, the first conductive support column is suitable for being connected with the high-voltage end, one end of the first connection column is connected with the first electrode of the electrode assembly, and the first connection column is made of a conductive material.

The discharge unit provided by the invention further comprises a first insulation part, wherein the first insulation part is wrapped on the periphery of the first connecting column.

According to the discharge unit provided by the invention, the second conductive support column is suitable for being connected with a low-voltage end, and the second electrode of the electrode assembly is electrically connected with the second conductive support column through a wire wound on the second connection column.

The discharge unit provided by the invention further comprises a second insulation part, wherein the second insulation part is wrapped on the surface of the second connecting column.

The discharging unit provided by the invention is characterized in that a first light chute is arranged on a first conductive support column, and the other end of the first connecting column is rotatably inserted into the first light chute;

The second conductive support column is provided with a second light chute, and the other end of the second connecting column is rotatably inserted into the second light chute.

The discharging unit provided by the invention further comprises a first driving structure which is arranged in the first light chute and is connected with the first connecting column;

And/or, the light guide plate further comprises a second driving structure which is arranged in the second light chute and is connected with the second connecting column.

The present invention also provides a purification apparatus comprising:

the discharge unit;

the collecting unit is arranged opposite to the discharging unit and comprises at least one magnet and at least two dust collecting plates which are arranged in parallel, and the dust collecting plates are connected with the magnet and have included angles with the magnet.

The purification device provided by the invention comprises two parallel magnets, wherein one magnet is vertically connected with one end of the dust collecting plate, and the other magnet is vertically connected with the other end of the dust collecting plate.

The invention also provides an air purifier which comprises the purifying device.

The technical scheme of the invention has the following advantages:

1. the electrode assembly comprises a first electrode, an insulating medium layer and a second electrode, wherein the first electrode is of a plate-shaped structure and is bent to form at least one accommodating space, an opening is formed in the accommodating space, the insulating medium layer is wrapped on the surface of the first electrode, and the second electrode is arranged in the accommodating space and is attached to the inner wall of the accommodating space.

The electrode assembly comprises a first electrode, an insulating medium layer and a second electrode, and is convenient for generating high-density plasma in an electrified state. The second electrode is attached on the inner wall of the accommodating space, so that the close attachment of the two electrodes is realized, the discharge intensity is increased in millimeter-level micro discharge, and the discharge area is narrow due to the close attachment of the two electrodes, so that the ozone amount generated by discharge is reduced.

For the first electrode with a flat plate or a column shape, the plasma is easy to diffuse, stable plasma cannot be generated, and in order to achieve higher sterilization and purification efficiency, higher voltage is required to generate higher ozone amount. According to the electrode assembly, the first electrode is bent out of at least one containing space, the second electrode is arranged in the containing space, discharge is realized in the containing space, plasma generated by the discharge is more concentrated, and the sterilizing and purifying efficiency is higher.

2. The discharge unit provided by the invention comprises a supporting structure and a plurality of electrode assemblies, wherein the electrode assemblies are rotatably connected with the supporting structure, so that the distribution of an air flow field is changed, the full contact reaction of the electrode assemblies and air is realized, and the higher sterilization and purification efficiency is achieved.

3. The invention provides a purification device which comprises a discharge unit and a collection unit, wherein the collection unit is arranged opposite to the discharge unit and comprises at least one magnet and at least two dust collecting plates which are arranged in parallel, and the dust collecting plates are connected with the magnet.

The collecting unit is arranged opposite to the discharge unit and is positioned behind the discharge unit and used for collecting the charged particles of the discharge unit. The magnet applies a magnetic field to the dust collecting area of the dust collecting plate, and the charged particles perform rotary motion in the magnetic field under the action of Lorentz force, so that the residence time of the charged particles between the dust collecting plates is prolonged, the charged particles are more easily adsorbed by the dust collecting plate, and the sterilizing and purifying efficiency is improved.

Drawings

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings that are needed in the description of the embodiments or the prior art will be briefly described, and it is obvious that the drawings in the description below are some embodiments of the present invention, and other drawings can be obtained according to the drawings without inventive effort for a person skilled in the art.

FIG. 1 is a schematic view of an electrode assembly of the present invention;

FIG. 2 is a schematic diagram of a discharge cell according to the present invention;

Fig. 3 is an enlarged view of a portion a of fig. 2;

fig. 4 is an enlarged view of a portion B of fig. 2;

FIG. 5 is a schematic view of a collection unit of the present invention;

Fig. 6 is a schematic diagram of the movement of charged particles according to the present invention.

Reference numerals illustrate:

1-electrode assembly, 11-first electrode, 111-arc groove, 12-insulating dielectric layer, 13-second electrode, 2-supporting structure, 21-first conductive support column, 22-second conductive support column, 3-first connecting column, 4-second connecting column, 5-first insulating part, 6-second insulating part, 7-wire, 8-magnet, 9-dust collecting plate, 10-plasma generator, 101-high voltage end and 102-low voltage end.

Detailed Description

The following description of the embodiments of the present invention will be made apparent and fully in view of the accompanying drawings, in which some, but not all embodiments of the invention are shown. 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.

In the description of the present invention, it should be noted that the directions or positional relationships indicated by the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc. are based on the directions or positional relationships shown in the drawings, are merely for convenience of describing the present invention and simplifying the description, and do not indicate or imply that the apparatus or elements referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus should not be construed as limiting the present invention. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.

In the description of the present invention, unless explicitly stated or limited otherwise, the terms "mounted," "connected," and "connected" are to be construed broadly, and may be, for example, fixedly connected, detachably connected, or integrally connected, mechanically connected, electrically connected, directly connected, indirectly connected via an intervening medium, or in communication between two elements. The specific meaning of the above terms in the present invention will be understood in specific cases by those of ordinary skill in the art.

In addition, the technical features of the different embodiments of the present invention described below may be combined with each other as long as they do not collide with each other.

Referring to fig. 1-6, the electrode assembly 1 provided in this embodiment includes a first electrode 11, an insulating medium layer 12 and a second electrode 13, where the first electrode 11 is configured as a plate structure and is bent to form at least one accommodating space, the accommodating space is provided with an opening, the insulating medium layer 12 wraps the surface of the first electrode 11, and the second electrode 13 is disposed in the accommodating space and is attached to an inner wall of the accommodating space.

Comprising a first electrode 11, an insulating dielectric layer 12 and a second electrode 13, facilitates the generation of high density plasma by the electrode assembly 1 in an energized state. The second electrode 13 is attached to the inner wall of the accommodating space, so that the two electrodes are tightly attached, the discharge intensity is increased in millimeter-level micro-discharge, and the discharge area is narrow due to the tight attachment of the two electrodes, so that the ozone amount generated by the discharge is reduced. Preferably, the insulating medium layer 12 is uniformly wrapped on the surface of the first electrode 11.

For the first electrode 11 of flat plate or column shape, the plasma is easy to diffuse, the effect is not obvious, and in order to realize higher sterilizing and purifying effect, higher voltage driving is needed, and meanwhile, the ozone amount is increased, and the long-term contact of ozone is harmful to human body. In the electrode assembly 1, the first electrode 11 is bent out of at least one accommodating space, the second electrode 13 is arranged in the accommodating space, discharge is realized in the accommodating space, plasmas generated by the discharge are more concentrated, and under the same condition, the sterilization and purification efficiency of the electrode assembly 1 is higher. And the accommodating space is also provided with an opening, so that untreated air can conveniently enter the accommodating space, charged particles can conveniently leave the accommodating space after being discharged by the electrode, and the sterilizing and purifying efficiency is not affected.

The electrode assembly 1 in the embodiment utilizes the atmospheric pressure creeping discharge technology to enable the electrode to generate weak light blue light, and the discharge intensity is enough to inactivate bacteria and microorganisms, so that the effect of purifying and sterilizing is achieved. The electrode assembly 1 discharges, and the discharge intensity reaches glow discharge, unlike traditional static electricity and corona discharge, and charged particles generated by the intensity discharge can effectively act on pollutants such as gaseous pollutants, microorganisms and the like. And the byproducts are water and carbon dioxide, so that the water and carbon dioxide are harmless to human bodies.

In the electrode assembly 1 of the present embodiment, the accommodating space is an arc-shaped groove 111, and the notch of the arc-shaped groove 111 is the opening. Simple structure, easy shaping, and be convenient for second electrode 13 to be attached in arc groove 111 through the notch.

As an alternative embodiment, the accommodating space may be a tubular structure, and the opening may be provided on a side portion of the tubular structure.

In the electrode assembly 1 of this embodiment, the first electrode 11 is bent to form two arc-shaped grooves 111 arranged in an S-shape, and the openings of the two arc-shaped grooves 111 face opposite directions. Realize the multi-angle discharge of electrode assembly 1, the coverage of sterilization purification is wide.

On the premise of the same occupied space width, the discharge area of the first electrode 11 with the arc-shaped groove 111 is larger, and the sterilization and purification efficiency is higher.

In the electrode assembly 1 of the present embodiment, the first electrode 11 is made of a conductive material, and the second electrode 13 is a carbon fiber bundle, and at least part of carbon fibers of the carbon fiber bundle are attached to the outside of the insulating medium layer 12.

Preferably, the first electrode 11 is electrically connected to the high voltage terminal 101, and the second electrode 13 is electrically connected to the low voltage terminal 102. The first electrode 11 is made of conductive material, and the carbon fiber bundle is electrically connected with the low-voltage end 102, so that secondary electron effect generated by discharge is reduced, the intensity of discharge can be effectively controlled, and the ozone amount can be effectively controlled while the effective discharge is realized.

The embodiment also provides a discharge unit, which comprises a supporting structure 2 and a plurality of electrode assemblies 1, wherein the electrode assemblies 1 are rotatably connected with the supporting structure 2, so that the distribution of an air flow field is changed, the air pressure near an electrode is reduced, the air is influenced by the air pressure, the air is pushed to actively contact the discharge structure, the electrode assemblies 1 and the air are fully contacted and reacted, the more sufficient purifying effect is achieved, and the purifying efficiency is greatly improved. Moreover, the electrode assembly 1 is in direct wind direction in the rotation process, contacts more air, improves sterilization and purification efficiency, and enables the electrode assembly 1 not to be easy to accumulate ash, so that more charged particles directly reach a later collecting unit to be collected.

The discharge unit in this embodiment further comprises a first connecting post 3 and a second connecting post 4, wherein one end of the first connecting post 3 is connected with one end of the electrode assembly 1, the other end is rotatably connected with the supporting structure 2, and one end of the second connecting post 4 is connected with the other end of the electrode assembly 1, and the other end is rotatably connected with the supporting structure 2. The electrode assembly 1 is rotatably connected to the support structure 2 through the first and second connection posts 3 and 4.

In this embodiment, the support structure 2 includes a first conductive support column 21 and a second conductive support column 22 disposed in parallel, the other end of the first connection column 3 is rotatably connected to the first conductive support column 21, and the other end of the second connection column 4 is rotatably connected to the second conductive support column 22. The electrical connection with the electrode assembly 1 is achieved through the first conductive support columns 21 and the second conductive support columns 22. The first conductive support post 21 and the second conductive support post 22 are connected to electrically connect with the first electrode 11 and the second electrode 13, respectively.

In this embodiment, the first conductive support column 21 is adapted to be connected to the high voltage terminal 101, one end of the first connection column 3 is connected to the first electrode 11 of the electrode assembly 1, and the first connection column 3 is made of a conductive material. The high voltage end 101 may be the high voltage end 101 of the plasma generator 10. The first electrode 11 is electrically connected to the high voltage terminal 101 through the conductive first connection post 3 and the first conductive support post 21.

The discharge unit in this embodiment further includes a first insulating part 5, and the first insulating part 5 is wrapped around the outer circumference of the first connection post 3. Preventing the first connection post 3 from discharging and affecting its conductive effect.

In this embodiment, the second conductive support column 22 is adapted to be connected to the low voltage terminal 102, and the second electrode 13 of the electrode assembly 1 is electrically connected to the second conductive support column 22 through the wire 7 wound around the second connection column 4.

The discharge unit in this embodiment further includes a second insulating portion 6, and the second insulating portion 6 is wrapped around the surface of the second connection post 4. The second connection post 4 is prevented from conducting electricity with the second conductive support post 22 while also preventing the second connection post 4 from discharging.

In this embodiment, a first light chute is disposed on the first conductive support column 21, the other end of the first connection column 3 is rotatably inserted into the first light chute, a second light chute is disposed on the second conductive support column 22, and the other end of the second connection column 4 is rotatably inserted into the second light chute. The first light sliding grooves and the second light sliding grooves are respectively provided with a plurality of first conductive supporting columns 21 and second conductive supporting columns 22, and are distributed on the first conductive supporting columns 21 and the second conductive supporting columns 22 in a one-to-one correspondence manner, and the number of the first light sliding grooves and the second light sliding grooves corresponds to the number of the electrode assemblies 1.

Preferably, the electrode assembly 1 rotates with wind through the first connecting column 3 and the second connecting column 4, the friction force between the first connecting column 3 and the first light chute is small, the rotation is convenient under the action of wind force, and the friction force between the second connecting column 4 and the second light chute is small, and the rotation is convenient under the action of wind force.

One end of the first connecting column 3 is connected with one end of the first electrode 11, the distance from the connecting position of the first connecting column 3 and the first electrode 11 to two sides of the first electrode 11 is equal, one end of the second connecting column 4 is connected with the other end of the first electrode 11, and the distance from the connecting position of the second connecting column 4 and the first electrode 11 to two sides of the first electrode 11 is equal. Preferably, the first electrode 11 is bent to form two arc-shaped grooves 111 arranged in an S shape, and the first connecting column 3 and the second connecting column 4 are respectively connected at the connection positions of the two arc-shaped grooves 111 at two ends of the first electrode 11.

The discharging unit in this embodiment further includes a first driving structure disposed in the first light chute and connected to the first connecting post 3, and configured to provide rotation power for the first connecting post 3, so as to drive the electrode assembly 1 to rotate.

And/or, the discharging unit in this embodiment further includes a second driving structure, which is disposed in the second light chute and connected to the second connection post 4, so as to provide rotation power for the second connection post 4, and further drive the electrode assembly 1 to rotate.

As an alternative embodiment, the first driving structure may be connected to the support structure 2, and the driving end of the first driving structure may be connected to the first connection post 3. And/or the second driving structure is connected to the supporting structure 2, and the driving end of the second driving structure is connected to the second connecting column 4.

The embodiment also provides a purifying device, which comprises the discharging unit and the collecting unit, wherein the collecting unit is opposite to the discharging unit, the collecting unit comprises at least one magnet 8 and at least two dust collecting plates 9 which are arranged in parallel, and the dust collecting plates 9 are connected with the magnet 8 and have included angles with the magnet 8. Preferably, the collecting unit is disposed in parallel behind the discharge unit downstream in the gas flow direction. Preferably, the dust collecting plate 9 of the collecting unit is disposed in parallel with the electrode assembly 1, or the dust collecting plate 9 is disposed perpendicular to the electrode assembly 1, and the magnet 8 is disposed in parallel with the electrode assembly 1.

The collecting unit is arranged opposite to the discharge unit and is positioned behind the discharge unit and used for collecting the charged particles of the discharge unit. The magnet 8 applies a magnetic field to the dust collecting area of the dust collecting plate 9, and the charged particles perform rotary motion in the magnetic field under the action of Lorentz force, so that the residence time of the charged particles between the dust collecting plates 9 is prolonged, the charged particles are more easily adsorbed by the dust collecting plate 9, and the sterilizing and purifying efficiency is improved.

In particular, the magnets 8 may be one, two or more. The magnet 8 may be a permanent magnet 8 or a soft magnet 8.

In this embodiment, the collecting unit includes two parallel magnets 8, one of the magnets 8 is vertically connected to one end of the dust collecting plate 9, and the other magnet 8 is vertically connected to the other end of the dust collecting plate. The magnetic fields of the two magnets 8 are superposed, so that the residence time of charged particles between the dust collecting plates 9 is prolonged, and the charged particles are more easily adsorbed by the dust collecting plates 9, thereby improving the sterilizing and purifying efficiency.

The embodiment also provides an air purifier, which comprises the purification device and has high sterilization and purification efficiency.

It is apparent that the above examples are given by way of illustration only and are not limiting of the embodiments. Other variations or modifications of the above teachings will be apparent to those of ordinary skill in the art. It is not necessary here nor is it exhaustive of all embodiments. While still being apparent from variations or modifications that may be made by those skilled in the art are within the scope of the invention.

Claims

1. A discharge cell, comprising:

a support structure (2) comprising a first conductive support column (21) and a second conductive support column (22) arranged in parallel;

The electrode assembly (1) comprises a first electrode (11), an insulating medium layer (12), a second electrode (13) and a plurality of electrode assemblies, wherein the first electrode (11) is constructed into a plate-shaped structure and is bent to form at least one accommodating space, an opening is formed in the accommodating space, the insulating medium layer (12) is wrapped on the surface of the first electrode (11), and the second electrode (13) is arranged in the accommodating space and is attached to the inner wall of the accommodating space;

a first connecting column (3), one end of which is connected with one end of the electrode assembly (1) and the other end of which is rotatably connected with a first conductive supporting column (21) of the supporting structure (2);

And one end of the second connecting column (4) is connected with the other end of the electrode assembly (1), and the other end of the second connecting column is rotatably connected with a second conductive supporting column (22) of the supporting structure (2).

2. Discharge unit according to claim 1, wherein the receiving space is an arc-shaped groove (111), the notch of the arc-shaped groove (111) being the opening.

3. Discharge unit according to claim 2, wherein the first electrode (11) is bent with two arc-shaped grooves (111) arranged in an S-shape, the openings of the two arc-shaped grooves (111) facing in opposite directions.

4. A discharge unit according to any one of claims 1-3, characterized in that the first electrode (11) is made of an electrically conductive material and the second electrode (13) is a carbon fiber bundle, at least part of the carbon fibers of which are attached to the outside of the insulating medium layer (12).

5. A discharge unit according to any one of claims 1-3, characterized in that the first conductive support column (21) is adapted to be connected to a high voltage terminal (101), that one end of the first connection column (3) is connected to a first electrode (11) of the electrode assembly (1), and that the first connection column (3) is made of an electrically conductive material.

6. The discharge unit according to claim 5, further comprising a first insulating portion (5), the first insulating portion (5) being wrapped around the outer periphery of the first connection post (3).

7. Discharge unit according to claim 5, wherein the second conductive support column (22) is adapted to be connected to a low voltage terminal (102), the second electrode (13) of the electrode assembly (1) being electrically connected to the second conductive support column (22) by means of a wire (7) wound around the second connection column (4).

8. The discharge unit according to claim 7, further comprising a second insulating portion (6), the second insulating portion (6) being wrapped around the surface of the second connection post (4).

9. The discharge unit according to any one of claims 6-8, wherein a first light chute is provided on the first conductive support column (21), into which the other end of the first connection column (3) is rotatably inserted;

The second conductive support column (22) is provided with a second light chute, and the other end of the second connecting column (4) is rotatably inserted into the second light chute.

10. The discharge unit according to claim 9, further comprising a first driving structure arranged in the first light chute and connected to the first connection post (3);

And/or, the optical fiber display device further comprises a second driving structure which is arranged in the second optical chute and is connected with the second connecting column (4).

11. A purification apparatus, comprising:

the discharge cell of any one of claims 1-10;

The collecting unit is arranged opposite to the discharging unit and comprises at least one magnet (8) and at least two dust collecting plates (9) arranged in parallel, and the dust collecting plates (9) are connected with the magnet (8).

12. The purification device according to claim 11, wherein the collection unit comprises two parallel magnets (8), one of the magnets (8) being vertically connected to one end of the dust collecting plate (9), and the other magnet (8) being vertically connected to the other end of the dust collecting plate (9).

13. An air cleaner comprising a cleaning apparatus according to claim 11 or 12.