CN116078156A

CN116078156A - Air purifying device

Info

Publication number: CN116078156A
Application number: CN202310250968.9A
Authority: CN
Inventors: 林小清; 伍晨迪; 马明宇; 封宗瑜; 罗汉兵
Original assignee: Gree Electric Appliances Inc of Zhuhai
Current assignee: Gree Electric Appliances Inc of Zhuhai
Priority date: 2023-03-15
Filing date: 2023-03-15
Publication date: 2023-05-09

Abstract

The present invention relates to an air purifying apparatus, comprising: the plasma generation cavity is provided with an air inlet for introducing air to be purified and an air outlet for discharging the purified air; the first electrode is arranged in the plasma generation cavity; the second electrode is arranged outside the plasma generation cavity, and voltage can be applied between the second electrode and the first electrode so as to generate plasma in the plasma generation cavity; and ozone decomposition catalyst particles filled in the plasma generation cavity. The air purifying device can reduce ozone residue and improve purifying performance.

Description

Air purifying device

Technical Field

The invention relates to the technical field of air purification, in particular to an air purification device.

Background

TVOC (Total Volatile Organic Compounds ) is one of the important indicators for measuring the indoor air pollution level. Because TVOC has great harm to human health, the processing technology of the TVOC is increasingly valued.

Among the current TVOC processing techniques, the low temperature plasma technique is a safe and efficient air purification processing technique, which can effectively improve the air quality. The low temperature plasma technology is to utilize the plasma including high energy electron and strong oxidizing active group generated during the discharge process to interact with TVOC gas molecules to degrade the TVOC gas into CO by oxidation reduction ₂ And H ₂ And the harmless products such as O and the like can realize the purpose of removing TVOC, and have the characteristics of strong purifying capacity, continuous removal of peculiar smell and the like.

However, there are also problems with low temperature plasma technology for air purification: for example, in the generation of plasma from a gas discharge, ozone is often associated with the generation of a large amount of by-products. The human body can cause adverse reactions such as headache, dry cough in throat, mucous membrane injury and the like after being contacted with ozone for a long time, and can cause irreversible injury to the human body health. The existing air purifying device is difficult to effectively solve the problem of ozone residue, so that the purifying performance is required to be improved.

Disclosure of Invention

Accordingly, it is necessary to provide an air purifying apparatus capable of reducing ozone residue and improving purifying performance.

The invention is realized by the following technical scheme.

The present invention provides an air purifying apparatus, comprising:

the plasma generation cavity is provided with an air inlet for introducing air to be purified and an air outlet for discharging the purified air;

the first electrode is arranged in the plasma generation cavity;

the second electrode is arranged outside the plasma generation cavity, and voltage can be applied between the second electrode and the first electrode so as to generate plasma in the plasma generation cavity; and

Ozone decomposing catalyst particles are filled in the plasma generating cavity.

The air purifying device is characterized in that air to be purified is introduced from the air inlet during operation, and is applied between the second electrode and the first electrodeApplying a voltage to generate plasmas including but not limited to high-energy electrons and strong oxidative active groups by gas discharge reaction in the plasma generation cavity, so that the plasmas can interact with TVOC gas molecules in the air to be purified to enable the TVOC gas molecules to be degraded into CO by oxidation reduction ₂ And H ₂ And harmless products such as O and the like, and can effectively remove TVOC. In addition, a large amount of by-product ozone generated in the process of generating plasma by gas discharge can be fully contacted with ozone decomposition catalyst particles filled in the plasma generation cavity and decomposed into oxygen, so that the in-situ effective decomposition of ozone is realized, the ozone residue of the air after purification can be effectively reduced, and the air purification performance is improved.

According to the air purifying device, through the synergistic effect of the plasma and the ozone decomposition catalyst particles, the contact area of ozone and the ozone decomposition catalyst particles is increased by using the filling mode of the ozone decomposition catalyst particles, and the decomposition of ozone is accelerated by using the thermal effect generated in the gas discharge process, so that the water poisoning deactivation of the ozone decomposition catalyst particles is inhibited, TVOC gas molecules in air can be effectively removed, ozone residues are reduced, the service life of the ozone decomposition catalyst particles can be effectively prolonged, the use cost is reduced, and the energy utilization efficiency is improved.

In any of these embodiments, the ozonolysis catalyst particles comprise a catalytically active component comprising at least one of cerium manganese oxide, cobalt manganese oxide, and copper manganese oxide.

In any of the embodiments, the ozonolysis catalyst particles further comprise a porous support on which the catalytically active component is supported.

In any of these embodiments, the porous support comprises at least one of porous alumina particles and porous molecular sieves.

In any of the embodiments, the ozonolysis catalyst particles include at least one of porous alumina particles loaded with cerium manganese oxide and porous alumina particles loaded with copper manganese oxide.

In any of these embodiments, the volume average particle size of the ozonolysis catalyst particles is in the range of 0.5mm to 3mm.

In any of these embodiments, the volume average particle size of the ozonolysis catalyst particles is in the range of 1mm to 2mm.

In any of these embodiments, the ozonolysis catalyst particles have a fill volume of 60% to 90% of the total volume of the plasma generation cavity.

In any embodiment, the air inlet and the air outlet are both arranged on the cavity wall of the plasma generation cavity, and the air inlet and the air outlet are staggered.

In any embodiment, the material of the plasma generation cavity is an insulating medium material; and/or the number of the groups of groups,

the first electrode is one of a stainless steel rod and a tungsten rod; and/or the number of the groups of groups,

the second electrode is one of a copper mesh, an aluminum foil and an iron wire mesh.

In any of these embodiments, the plasma generation chamber comprises an insulating medium tube and a sealing cap for sealing the insulating medium tube.

Drawings

Fig. 1 is a schematic structural diagram of an air purifying apparatus according to an embodiment of the present invention.

Reference numerals illustrate:

100. an air purifying device; 110. a plasma generation cavity; 111. an insulating medium tube; 112. sealing cover; 101. an air inlet; 102. an air outlet; 120. a first electrode; 130. a second electrode; 140. ozonolysis catalyst particles.

Detailed Description

In order that the invention may be readily understood, a more complete description of the invention will be rendered by reference to the appended drawings. Preferred embodiments of the present invention are shown in the drawings. This invention may, however, be embodied in many different forms and should not be construed as limited to the embodiments set forth herein. Rather, these embodiments are provided so that this disclosure will be thorough and complete.

In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc. indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings are merely for convenience in describing the present invention and simplifying the description, and do not indicate or imply that the device or element being referred to must have a specific orientation, be configured and operated in a specific orientation, and therefore should not be construed as limiting the present invention.

Furthermore, the terms "first," "second," and the like, are used for descriptive purposes only and are not to be construed as indicating or implying a relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defining "a first" or "a second" may explicitly or implicitly include at least one such feature. In the description of the present invention, the meaning of "plurality" means at least two, for example, two, three, etc., unless specifically defined otherwise.

In the present invention, unless explicitly specified and limited otherwise, the terms "mounted," "connected," "secured," and the like are to be construed broadly, and may be, for example, fixedly connected, detachably connected, or integrally formed; can be mechanically or electrically connected; either directly or indirectly, through intermediaries, or both, may be in communication with each other or in interaction with each other, unless expressly defined otherwise. The specific meaning of the above terms in the present invention can be understood by those of ordinary skill in the art according to the specific circumstances.

In the present invention, unless expressly stated or limited otherwise, a first feature "up" or "down" a second feature may be the first and second features in direct contact, or the first and second features in indirect contact via an intervening medium. Moreover, a first feature being "above," "over" and "on" a second feature may be a first feature being directly above or obliquely above the second feature, or simply indicating that the first feature is level higher than the second feature. The first feature being "under", "below" and "beneath" the second feature may be the first feature being directly under or obliquely below the second feature, or simply indicating that the first feature is less level than the second feature.

The terms "vertical," "horizontal," "upper," "lower," "left," "right," and the like are used herein for illustrative purposes only and are not meant to be the only embodiment.

It will be understood that when an element is referred to as being "fixed to" another element, it can be directly on the other element or intervening elements may also be present. When an element is referred to as being "connected" to another element, it can be directly connected to the other element or intervening elements may also be present.

Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs. The terminology used herein in the description of the invention is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention. The term "and/or" as used herein includes any and all combinations of one or more of the associated listed items.

Referring to fig. 1, an embodiment of the present invention provides an air cleaning device 100, which includes a plasma generating chamber 110, a first electrode 120, a second electrode 130, and ozone decomposing catalyst particles 140.

The plasma generation chamber 110 has an air inlet 101 for the air to be purified to be introduced and an air outlet 102 for the purified air to be discharged.

The first electrode 120 is disposed within the plasma generation chamber 110.

The second electrode 130 is disposed outside the plasma generation chamber 110. A voltage can be applied between the second electrode 130 and the first electrode 120 to generate plasma in the plasma generation chamber 110.

Ozone decomposing catalyst particles 140 are filled in the plasma generating cavity 110.

The air purification device 100 is operated by introducing air to be purified from the air inlet 101, applying a voltage between the second electrode 130 and the first electrode 120, so as to generate plasmas including but not limited to high-energy electrons and strong oxidative active groups by gas generating discharge reaction in the plasma generating cavity 110, and thus the plasmas can interact with TVOC gas molecules in the air to be purified to enable the TVOC gas molecules to be oxidized and degraded into CO by oxidation reduction ₂ And H ₂ And harmless products such as O and the like, and can effectively remove TVOC. In addition, a large amount of byproduct ozone generated simultaneously in the process of generating plasma by gas discharge can be fully contacted with the ozone decomposition catalyst particles 140 filled in the plasma generation cavity 110 and decomposed into oxygen, so that the in-situ effective decomposition of ozone is realized, the ozone residue of the purified air can be effectively reduced, and the air purification performance is improved.

In addition, since the catalytic efficiency of the ozonolysis catalyst is greatly affected by the humidity of the air or the like, in general, the catalytic efficiency and the service life of the ozonolysis catalyst are reduced after a period of use, and thus frequent replacement is required, resulting in high use cost. For example, an ozone decomposition catalyst is provided downstream of the air outlet 102 of the air cleaning device 100 for decomposing ozone in the air after plasma cleaning, and there is a problem in that the catalyst is severely deactivated by poisoning.

The air purifying device 100 fills the ozone decomposing catalyst particles 140 in the plasma generating cavity 110, which is not only beneficial to in-situ decomposition of ozone, but also can make the heat generated by the gas discharge reaction act on the air and the ozone decomposing catalyst particles 140 in time, reduce the risk of water poisoning and deactivation of the ozone decomposing catalyst particles 140, and further prolong the service life of the ozone decomposing catalyst particles 140. On the other hand, the energy utilization efficiency is also effectively improved, and the serious waste of energy sources caused by that a large amount of heat generated in the working process in the plasma generation cavity 110 is not utilized is avoided.

According to the air purifying device 100, through the synergistic effect of the plasma and the ozone decomposition catalyst particles 140, the contact area between ozone and the ozone decomposition catalyst particles 140 is increased by using the filling mode of the ozone decomposition catalyst particles 140, and the decomposition of ozone is accelerated by using the thermal effect generated in the gas discharge process, so that the water poisoning deactivation of the ozone decomposition catalyst particles 140 is inhibited, TVOC gas molecules in the air can be effectively removed, the ozone residue is reduced, the service life of the ozone decomposition catalyst particles 140 can be effectively prolonged, the use cost is reduced, and the energy utilization efficiency is improved.

In some of these embodiments, the ozonolysis catalyst particles 140 include a catalytically active component (not shown). The catalytically active component includes, but is not limited to, at least one of cerium manganese oxide, cobalt manganese oxide, and copper manganese oxide. These catalytically active components have a high decomposition efficiency for ozone.

Further, the ozonolysis catalyst particles 140 further include a porous carrier (not shown). The catalytically active component is supported on a porous carrier. Further, the porous support includes, but is not limited to, at least one of porous alumina particles and porous molecular sieves.

As an example, the ozonolysis catalyst particles 140 include at least one of porous alumina particles loaded with cerium manganese oxide, porous alumina particles loaded with copper manganese oxide, and the like. In a specific example, the ozonolysis catalyst particles 140 are porous alumina particles loaded with cerium manganese oxide.

It is understood that the porous alumina particles loaded with cerium manganese oxide, the porous alumina particles loaded with copper manganese oxide, and the like can be obtained by commercial or homemade methods.

As an example, the cerium manganese oxide-loaded porous alumina particles may be prepared by the following preparation method. Wherein the porous alumina particles may be porous activated alumina pellets. The preparation method comprises the following steps S1 to S3.

S1, mixing a water-soluble cerium source and a water-soluble manganese source with water to form a precursor solution.

The water-soluble cerium source may be anhydrous cerium nitrate or hydrated cerium nitrate, and may be, for example, cerium nitrate hexahydrate powder. The water-soluble manganese source may be at least one of manganese nitrate and manganese acetate.

S2, soaking the porous alumina particles in the precursor solution, and adding a sodium hydroxide solution to uniformly mix.

Wherein, the sodium hydroxide solution is added in a dropwise manner and is used as a precipitant.

In one example, the time to continue mixing after the addition of the sodium hydroxide solution may be 8 hours to 12 hours.

And S3, taking out the impregnated porous alumina particles, and sequentially drying and calcining in an oxidizing atmosphere to obtain the porous alumina particles loaded with cerium-manganese oxide.

In one example, the temperature of drying may be 80-100 ℃ and the time of drying may be 8-12 hours.

In one example, the oxidizing atmosphere of calcination may be air or oxygen.

In one example, the calcination temperature may be 450-600 ℃ and the calcination time may be 2-4 hours. Further, the temperature rising rate of the calcination may be 2 to 5 ℃/min.

In some of these embodiments, the volume average particle size of the ozonolysis catalyst particles 140 is in the range of 0.5mm to 3mm.

Considering the influence of the accumulation of the ozone decomposing catalyst particles 140 on the wind resistance, the smaller the volume average particle diameter of the ozone decomposing catalyst particles 140 is, the tighter the accumulation thereof, so the wind resistance to the air is larger; the larger the volume average particle diameter of the ozonolysis catalyst particles 140, the smaller the specific surface area per se, the smaller the supportable catalytic active component, the smaller the contact area with ozone, and the reduced the ozone degradation efficiency. Thus, on the one hand, it is required that the ozonolysis catalyst particles 140 are in contact with ozone as much as possible, improving the efficiency of ozonolysis; on the other hand, it is considered to reduce the influence of the wind resistance of the ozone decomposing catalyst particles 140 on the air flow rate as much as possible to reduce the influence on the treatment rate of the air cleaning device 100. Through extensive studies, by controlling the volume average particle diameter of the ozonolysis catalyst particles 140 to be in the above-described suitable range, a large air treatment rate and superior ozonolysis efficiency can be obtained.

Further, the volume average particle diameter of the ozonolysis catalyst particles 140 is 1mm to 2mm. In a specific example, the porous support has a volume average particle diameter of 1mm to 2mm. It is understood that the catalytically active component is supported with little effect on the volume average particle size of the ozonolysis catalyst particles 140. Within this preferred range, better ozone degradation efficiency can be obtained at a larger air treatment rate (e.g.,. Gtoreq.1L/min).

In some of these embodiments, the fill volume of the ozonolysis catalyst particles 140 is 60% to 90% of the total volume of the plasma generation cavity 110. It is understood that the fill volume of the ozonolysis catalyst particles 140 may be 60%, 70%, 80%, 90% of the total volume of the plasma generation cavity 110, as an example. The filling volume of the ozonolysis catalyst particles 140 may be in the range constituted by any two values mentioned above as the end values.

The filling volume here means: the ozonolysis catalyst particles 140 as a whole occupy the volume of the plasma generation chamber 110, including the pores between the particles in the stacked state of the ozonolysis catalyst particles 140. For example, the filling volume of the ozonolysis catalyst particles 140 is 90% of the total volume of the plasma generating chamber 110, meaning that 90% of the entire space of the plasma generating chamber 110 is filled with the ozonolysis catalyst particles 140, but does not mean that there are no voids between the particles in the stacked state of the ozonolysis catalyst particles 140.

It will be appreciated that when the voltage applied between the first electrode 120 and the second electrode 130 is high, the ozone generation amount is high, and sufficient reaction between ozone and the ozonolysis catalyst particles 140 is required, the filling amount of the ozonolysis catalyst particles 140 can be set at a high level accordingly.

In some embodiments, the air inlet 101 and the air outlet 102 are both arranged on the cavity wall of the plasma generating cavity 110, and the air inlet 101 and the air outlet 102 are staggered. It should be noted that, the staggered arrangement of the air inlet 101 and the air outlet 102 refers to the staggered arrangement in the axial direction or the direction perpendicular to the axial direction of the plasma generating cavity 110 with respect to the plasma generating cavity 110, so as to prolong the flow path of the air to be purified in the plasma generating cavity 110, prolong the action time of the air, the plasma and the ozone decomposition catalyst particles 140, and improve the air purifying efficiency.

It is understood that in other examples, the gas inlet 101 and the gas outlet 102 may also be disposed opposite to each other in the axial direction of the plasma generation chamber 110.

In some embodiments, the material of the plasma generating chamber 110 may be an insulating dielectric material.

Further, the plasma generating chamber 110 includes an insulating medium tube 111 and a sealing cap 112 for sealing the insulating medium tube 111 to form a closed plasma generating chamber. Further, the material of the insulating medium pipe 111 includes, but is not limited to, quartz glass and alumina. Further, the sealing cover 112 may be made of polytetrafluoroethylene. In a specific example, the insulating medium pipe 111 is a hollow tubular structure with both ends open, and both ends thereof are respectively provided with sealing caps 112 for sealing.

Further, both the air inlet 101 and the air outlet 102 are provided on the side wall of the insulating medium pipe 111, and the air inlet 101 is provided higher than the air outlet 102. In an example, the ozonolysis catalyst particles 140 are filled into the insulating medium pipe 111 and not lower than the height position of the air inlet 101.

In some of these embodiments, the first electrode 120 may be one of a stainless steel rod and a tungsten rod, or the like. The first electrode 120 is provided as a high voltage at the axial position of the insulating medium tube 111. Further, the first electrode 120 passes through at least one sealing cap 112 at one end and is sealed by the sealing cap 112.

In some of these embodiments, the second electrode 130 is attached to the outer wall of the insulating medium pipe 111. In some of these embodiments, the second electrode 130 is one of a copper mesh, an aluminum foil, a copper foil, and an iron mesh.

In some embodiments, the air cleaning apparatus 100 further includes an air pump (not shown) that may be in communication with the air inlet 101 of the plasma generation chamber 110 for pumping air into the plasma generation chamber 110.

In order to make the objects, technical solutions and advantages of the present invention more concise, the present invention will be described in the following specific examples, but the present invention is by no means limited to these examples. The following examples are only preferred embodiments of the present invention, which can be used to describe the present invention, and should not be construed as limiting the scope of the invention. It should be noted that any modifications, equivalent substitutions and improvements made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

In order to better illustrate the present invention, the following description of the present invention will be given with reference to examples. The following are specific examples. The following raw materials are commercially available unless otherwise specified.

Example 1

As shown in fig. 1, in particular, the air cleaning device 100 includes a plasma generation chamber 110, a first electrode 120, a second electrode 130, and ozone decomposing catalyst particles 140. The plasma generation chamber 110 includes an insulating medium tube 111 and a sealing cap 112 for sealing the insulating medium tube 111. The insulating medium tube 111 is a quartz glass tube, the sealing cover 112 is a polytetrafluoroethylene material, and the first electrode 120 is a tungsten rod provided at an axial position of the insulating medium tube 111. The second electrode 130 is aluminum foil.

Among them, the ozonolysis catalyst particles 140 are filled in the insulating medium tube 111, which is specifically porous activated alumina particles loaded with cerium manganese oxide catalyst, with a volume average particle diameter of 1.5mm, which is commercially available. The fill volume of the ozonolysis catalyst particles 140 is 90% of the total volume of the plasma generation cavity 110.

Example 2

Example 2 is substantially the same as example 1 except that the volume average particle diameter of the ozonolysis catalyst particles 140 is 2.5mm, which is commercially available.

Comparative example 1

Comparative example 1 is substantially the same as example 1 except that the inside of the insulating medium pipe 111 in comparative example 1 is not filled with the above-mentioned catalyst particles, but the catalyst is directly supported on the inner wall of the insulating medium pipe 111. Specifically, a cerium-manganese oxide catalyst layer is formed on the entire surface of the inner wall of the insulating medium tube 111. Specifically, the cerium manganese oxide catalyst layer had a thickness of 40 μm. Other structures and materials of the air cleaning device 100 and the air cleaning performance test conditions are the same.

Testing air purifying performance:

a gas containing TVOC gas contaminants was introduced into the insulating medium tubes of the above examples and comparative examples from the gas inlet at a rate of 1L/min, respectively, and an alternating Voltage was applied between the first electrode and the second electrode to generate an electric field, which was Vpp (Voltage Peak-Peak) at 11KV, a frequency of 9KHz, and a real-time discharge for 30min. The purified air is discharged from the air outlet, and at the 5 th, 10 th, 15 th, 20 th, 25 th and 30 th minutes, the air discharged from the air outlet is collected once respectively, and the real-time ozone content in the air is detected, as shown in table 1.

The detection method of the ozone content is that the ozone content is obtained through real-time reading of an ozone detector.

Ppb (part per billion) is a dimensionless quantity, also known as a billion concentration.

(II) catalyst life test:

after continuous discharge for 2 hours under the conditions of the air purification performance test, the gas discharged from the gas outlet was collected and the ozone content thereof was detected as shown in table 1.

TABLE 1

From this, it can be seen that the catalyst was coated on the inner wall of the insulating medium pipe in comparative example 1, the catalyst was filled in the inside of the insulating medium pipe in example 1, and the ozone residue in comparative example 1 was much higher than that in example 1 after the purification in real time for 30min and the long-term operation for 2 hours. This demonstrates that comparative example 1 has significantly lower ozone decomposition efficiency than example 1. And after a long period of use the catalyst of comparative example 1 was much less catalytically effective than example 1.

The analysis may be that the catalyst of comparative example 1 is coated on the inner wall of the insulating medium pipe, the specific surface area is relatively small, the contact area between ozone and the catalyst is small, and the generated ozone is discharged out of the insulating medium pipe without being decomposed under the action of the air pump, so that the real-time ozone decomposition efficiency is not high. And the catalyst is poisoned and fails due to long-time use.

In the embodiment of the invention, the catalyst particles are filled in the insulating medium pipe, and the specific surface area of the catalyst particles is larger, so that the contact area with ozone is large, the ozone formed in the insulating medium pipe can be decomposed by the filled catalyst particles, and meanwhile, the decomposition of the ozone is accelerated by the heat effect generated in the gas discharging process, so that the probability of the catalytic decomposition reaction of the ozone is greatly increased, and the finally generated ozone amount is less than 300ppb, wherein in the embodiment 1 is far less than 100ppb, and the efficient in-situ decomposition of the ozone is realized. Meanwhile, the thermal effect generated in the gas discharge process can inhibit the water poisoning deactivation of the ozone decomposition catalyst particles, so that the catalytic efficiency of the ozone decomposition catalyst particles for long-time use is improved to a certain extent, in other words, the service life of the ozone decomposition catalyst particles is prolonged.

The technical features of the above-described embodiments may be arbitrarily combined, and all possible combinations of the technical features in the above-described embodiments are not described for brevity of description, however, as long as there is no contradiction between the combinations of the technical features, they should be considered as the scope of the description.

The above examples illustrate only a few embodiments of the invention, which are described in detail and are not to be construed as limiting the scope of the invention. It should be noted that it will be apparent to those skilled in the art that several variations and modifications can be made without departing from the spirit of the invention, which are all within the scope of the invention. The scope of the invention is therefore intended to be covered by the appended claims, and the description and drawings may be interpreted in accordance with the contents of the claims.

Claims

1. An air cleaning apparatus, comprising:

a plasma generation cavity (110) having an air inlet (101) for the air to be purified to be introduced and an air outlet (102) for the purified air to be discharged;

a first electrode (120) disposed within the plasma generation chamber (110);

a second electrode (130) arranged outside the plasma generation cavity (110), wherein a voltage can be applied between the second electrode (130) and the first electrode (120) so as to generate plasma in the plasma generation cavity (110); and

Ozone decomposition catalyst particles (140) are filled in the plasma generation chamber (110).

2. The air cleaning apparatus according to claim 1, wherein the ozonolysis catalyst particles (140) comprise a catalytically active component comprising at least one of cerium manganese oxide, cobalt manganese oxide, and copper manganese oxide.

3. The air cleaning apparatus according to claim 2, wherein said ozonolysis catalyst particles (140) further comprise a porous support, said catalytically active component being supported on said porous support.

4. The air purification apparatus of claim 3, wherein the porous support comprises at least one of porous alumina particles and porous molecular sieves.

5. The air cleaning apparatus according to claim 1, wherein the ozonolysis catalyst particles (140) include at least one of cerium manganese oxide-supported porous alumina particles and copper manganese oxide-supported porous alumina particles.

6. An air cleaning apparatus according to any one of claims 1 to 5, wherein the volume average particle diameter of the ozonolysis catalyst particles (140) is 0.5mm to 3mm.

7. The air cleaning apparatus according to claim 6, wherein the volume average particle diameter of the ozonolysis catalyst particles (140) is 1mm to 2mm.

8. The air cleaning apparatus according to any one of claims 1 to 5, wherein a filling volume of said ozonolysis catalyst particles (140) is 60% to 90% of a total volume of said plasma generating cavity (110).

9. The air cleaning apparatus according to any one of claims 1 to 5, wherein the air inlet (101) and the air outlet (102) are both provided on a chamber wall of the plasma generation chamber (110), and the air inlet (101) and the air outlet (102) are arranged in a staggered manner.

10. The air cleaning apparatus according to any one of claims 1 to 5, wherein a material of said plasma generation chamber (110) is an insulating dielectric material; and/or the number of the groups of groups,

the first electrode (120) is one of a stainless steel rod and a tungsten rod; and/or the number of the groups of groups,

the second electrode (130) is one of a copper mesh, an aluminum foil, a copper foil and an iron wire mesh.

11. An air cleaning apparatus according to any one of claims 1 to 5, wherein said plasma generation chamber (110) comprises an insulating medium tube (111) and a sealing cover (112) for sealing said insulating medium tube (111).