WO2016000620A1

WO2016000620A1 - Air purification device and method

Info

Publication number: WO2016000620A1
Application number: PCT/CN2015/083079
Authority: WO
Inventors: 罗瑞真; 陈耀伟
Original assignee: 罗瑞真; 陈耀伟
Priority date: 2014-07-01
Filing date: 2015-07-01
Publication date: 2016-01-07
Also published as: CN105431687A; CN105431687B

Abstract

An air purification device (100) and a method for purifying air by using the device. The air purification device (100) has an air inlet (101), an air outlet (102), and an airflow passage formed between the air inlet (101) and the air outlet (102). The airflow passage comprises: a fan (300), comprising a fan air inlet (301) and a fan air outlet (302); an ionizer (200), comprising a circuit device (201) and ion release tips (202); a filter (500); and an air mixing space (400), located between the fan (300) and the filter (500), wherein one end (402) of the air mixing space (400) for outputting air is communicated with the air outlet (102) through the filter (500), and one end (401) of the air mixing space (400) for inputting air is communicated with the air inlet (101) through the fan (300). The ion release tips (202) are non-uniformly disposed in the cross section of the airflow passage. The air mixing space (400) has high air pressure compared with the pressure of air outside the air purification device (100).

Description

Air purification device and method

[Technical Field]

The present invention relates to the field of environmental protection, and more particularly to an apparatus and method for effectively filtering and purifying air.

【Background technique】

There are two main types of pollutants in the air. One is a large-sized particle such as dust, bacteria, mold, etc. The molecular structure is complex and is composed of a plurality of different substances or components, about one micron to The size of the micron; the other is a chemical such as gas, odor, volatile organic chemicals, its chemical structure is simple, composed of several chemical elements, and very small, only the size of emimeter to nanometer.

To deal with any form of contaminants, it is generally possible to use different types of filters or filters for the chemical and physical characteristics of the contaminants for effective energy purification or filtration. The use of these filters or filters generally utilizes a fan to drive the airflow, which drives the air containing contaminants into the filter or filter. Unless the contaminants are removed, the contaminants need to be removed for a longer residence time in the filter or filter; otherwise, in general, the larger the wind flow of the fan, the more polluted the flow in the room, so that as soon as possible The indoor pollution level reaches the average concentration, and the number of times the pollutants pass through the filter core or the filter can be increased. Therefore, the air volume or the air volume that can be purified by the high air volume air purification system is relatively large. For example, in filtering dust containing PM2.5/PM10 pollutant air, using a large air volume, high flow filter device with dust filter or air purification system, according to American AHAM standard, its Clean Air Delivery The value of Rate (CADR) is also relatively high, which is advantageous for large-area places or places with high concentration of pollutants, for obvious and short-time purification or filtration of air.

Under normal circumstances, high-efficiency filters (High-Efficiency) are also used to remove fine respirable suspended particles. Particulate Air, HEPA). HEPA can be applied from medical equipment, automobiles, airplanes and homes. The filter material of the high-efficiency filter is usually made of randomly arranged chemical fibers (for example, polypropylene fiber, that is, polypropylene or polyester fiber, that is, polyester non-woven fabric) or glass fiber, and the diameter is about 0.5 to 2.0 μm. The floc or reticular structure is mainly used to intercept tiny dust or particles contained in the air passing through the filter. Filters that are also used in air purification, according to the filtration efficiency from low to high, are named as coarse filter, medium efficiency filter, sub-high efficiency filter and ultra-efficient filter higher than high efficiency filter.

If the filter has a finer floc or reticular structure, the chance of trapping or intercepting the tiny dust or particles contained in the air passing through the filter can also capture or intercept the relatively small volume of tiny dust. Or particles. For example, when comparing two high-efficiency filters: (i) high-efficiency filter with 99.9% interception efficiency, and (ii) high-efficiency filter with 99.999% intercept efficiency, (ii) high-efficiency filter effect is ( i) 100 times of the high-efficiency filter, that is, when the same wind speed is used to filter the tiny dust or particles, the air passing through the (i) high-efficiency filter will go through 100 times to achieve the efficiency of 1 (ii). Filter effect of the filter.

Therefore, if a lower efficiency filter is used to achieve the same effect of a higher efficiency filter, it is necessary to increase the wind speed to increase the number of filtrations, thereby causing noise due to increased wind speed, increasing energy consumption, and also being easy. Causes damage to other filter layers, or allows other filter layers (such as filter layers that adsorb deodorization or filter layers that adsorb or remove gaseous contaminants with activated carbon) to operate at high wind speeds, reducing contaminants in the adsorbent filter layer. The residence time reduces the effect of other filter layers.

However, there is also an ionization device that cooperates with the dust collector to filter air to remove dust, dust, such as PM2.5/PM10 contaminants in the air. For example, by using an ion generator in combination with a filter screen, the ion generator first electrostatically or electrically charges the dust in the air and collects it on the dust collecting device or the filter screen. In this way, when the dust in the air passes through the ionization device, it is charged with static electricity or electric charge. The dust with static electricity or electric charge will repel each other. When the dust with static electricity or electric charge passes through the dust collecting device such as the filter net, it is only the volume. Large dust, or the volume of dust is close to the gap of the filter screen, and it is easy to be captured by the filter screen. The dust with less static electricity and smaller volume, or the dust smaller than the gap of the filter screen, drives the wind forward at the wind speed. Flow, and in the case of mutual exclusion with other electrostatically charged dust, it is still not effectively attracted, or deviated from its original wind speed, and the floc or mesh structure adsorbed to the filter. These dusts are smaller than the gaps of the filter screen, and even if they adhere to static electricity, they escape from the gaps of the filter screen. Therefore, the dust of a small volume cannot be effectively intercepted by the ionizer and the dust collecting device that cannot be used.

[Summary of the Invention]

Based on this, it is necessary to provide an air purifying device and method for using some filters for purifying fine dust or particles, even if the filter screen is used in general, the intercepting efficiency is relatively low, and the present invention is utilized. The invention provides an air purifying device and method which can also improve the intercepting efficiency at the same wind speed.

An air purifying device for purifying air containing dust particles, the air purifying device having an air inlet and an air outlet, and an air flow passage formed between the air inlet and the air outlet, the air purifying device comprising:

The fan includes a fan air inlet and a fan air outlet, and the fan is used to blow air along the air flow passage from the air inlet of the air purification device to the air outlet of the air purification device;

An ionizer comprising a circuit arrangement and an ion release tip;

a filter for capturing dust particles in the air;

An air mixing space, the air mixing space is located between the blower and the filter; one end of the output air of the air mixing space is communicated with an air outlet of the air purifying device through a filter, the air mixing space One end of the input air is communicated with the air inlet of the air purifying device through the fan;

The ion releasing tip is non-uniformly disposed on a cross section of the air flow passage such that part of the dust particles in the air become charged dust particles; the air mixing space is opposite to the air pressure around the outside of the air cleaning device, Have a higher air pressure.

In one of the embodiments, the fan is a blower.

In one embodiment, the fan is disposed upstream of the ion release tip and the filter is disposed downstream of the ion release tip.

In one of the embodiments, the ion release tip is located at the fan vent and adjacent one of the cross-sections of the fan vent.

In one embodiment, the cross-sectional area of the fan vent is smaller than the cross-sectional area of the air mixing space.

In one embodiment, the fan air outlet has a cross section that is enlarged from small to large, and the ion release tip is disposed at one end of the fan air outlet having a smaller cross section.

In one of the embodiments, the area of the largest cross section of the fan vent is equal to the area of the cross section of the air mixing space.

In one of the embodiments, the ion release tip is disposed at the air mixing space adjacent to the fan air outlet and adjacent to one side of the fan air outlet cross section.

In one embodiment, the ion release tip is disposed at a boundary between the laminar flow and the turbulent flow of the air mixing space, and/or a laminar flow and a turbulent flow boundary.

In one embodiment, the filter comprises a screen and a frame for fixing the screen, the upstream position of the frame of the filter is connected with at least one conductive mesh, and the conductive mesh is connected to the ion generation The ground of the circuit device of the device; or the frame of the filter is a conductive frame.

A method for purifying air by using an air purifying device, the air purifying device having an air inlet and an air outlet, and an air flow passage formed between the air inlet and the air outlet, the method comprising the following steps:

Using a hair dryer to blow air containing dust particles along the air flow passage from the air inlet of the air purification device to the air outlet of the air purification device;

The ion generator is used to release ions so that part of the dust particles in the air become charged dust particles;

The charged dust particles in the air collide with the uncharged dust particles and are gathered together to become larger dust particles;

A filter is used to capture dust particles in the air.

Compared with the prior art air purifying apparatus and method, the present invention utilizes dust in a part of the air to be charged, and the charged dust and the uncharged dust collide and aggregate to form larger-sized dust particles, thereby lifting the trapped by the filter. Opportunities, even if the wind speed is not increased, or the original filter is not effective, can greatly enhance the effect of air purification.

[Description of the Drawings]

1 is a structural view of an air purifying apparatus according to Embodiment 1 of the present invention;

2 is a structural view of an air purifying device according to Embodiment 2 of the present invention;

Figure 3 is a structural view showing an air purifying device according to Embodiment 3 of the present invention;

4 is a structural view of an air purifying device according to Embodiment 4 of the present invention;

Figure 5 is a structural view of an air purifying device according to Embodiment 5 of the present invention;

6 is a comparison of the air purifying devices of Comparative Example 1 and Example 2: (1) the ion generator is activated; and (2) the dust removal efficiency of the ion generator is not activated;

Figure 7 is a comparison of the dust removal efficiency of placing the ion release tip at different positions in the air purification device;

Figure 8 is a schematic view showing the process of purifying air by using the air purifying device of the present invention;

Fig. 9 is a schematic view showing the air purification process of a general air purifying device.

【detailed description】

The above described objects, features and advantages of the present invention will become more apparent from the aspects of the appended claims. Numerous specific details are set forth in the description below in order to provide a thorough understanding of the invention. However, the present invention can be implemented in many other ways than those described herein, and those skilled in the art can make similar modifications without departing from the spirit of the invention, and thus the invention is not limited by the specific embodiments disclosed below.

It should be noted that when an element is referred to as being "fixed" to another element, it can be directly on the other element or the element can be present. When an element is considered to be "connected" to another element, it can be directly connected to the other element or.

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, unless otherwise defined. The terminology used in the description of the present invention is for the purpose of describing particular embodiments and is not intended to limit the invention. The term "and/or" used herein includes any and all combinations of one or more of the associated listed items.

As shown in Embodiment 1 of FIG. 1, the air cleaning apparatus 100 of the present invention includes a fan, an ionizer 200, an air mixing space 400, and a filter 500. In an embodiment, the fan is a blower 300.

The air purifying device 100 has an air inlet 101 and an air outlet 102, and an air flow passage is formed between the air inlet 101 and the air outlet 102.

The blower 300 includes a fan air inlet 301 and a fan air outlet 302. The fan air inlet 301 draws in air 801 containing dust particles and being cleaned by the filter 500; the fan air outlet 302 blows air 801 containing dust particles and being cleaned by the filter 500; the hair dryer 300 air is blown downstream from the upstream along the air flow passage in the air cleaning device 100, that is, the direction from the air inlet 101 to the air outlet 102 of the air cleaning device 100.

The ionizer 200 includes a circuit arrangement 201 and an ion release tip 202. In a specific embodiment, the ions released by the ion release tip 202 are negative ions.

One end 402 of the output air of the air mixing space 400 communicates with the air outlet 102 of the air cleaning device 100 through the filter 500; one end 401 of the input air of the air mixing space 400 passes through the blower 300 and the air The air inlet 101 of the purification device 100 communicates. The air mixing space 400 may be a space that can create turbulence or turbulence. Further, the air mixing space 400 is a positive pressure space; the air pressure of the air mixing space has a higher air pressure than the air pressure around the outside of the air cleaning device; the filter faces the One side of the air mixing space has a higher air pressure than the air outlet and/or the air inlet of the air purifying device.

The filter 500 includes a screen and a frame for fixing the screen. When the filter 500 purifies air, the filter screen is used to capture fine dust particles in the air. In a specific embodiment, the filter 500 is a organ-like folded filter; the filter material of the filter is made of composite filter paper or glass fiber filter. Further, the filter may be a high efficiency air filter (HEPA). The filter 500 is disposed at the air outlet 102.

The air purifying device 200 provided in the embodiment 2 shown in FIG. 2 is substantially the same as the air purifying device 100 shown in the first embodiment, except that the frame of the filter 500 is a conductive frame, such as a metal frame 501. Further, the frame of the filter 500 can be connected to the ground of the circuit device 201 of the ionizer 200. This arrangement allows the filter material of the filter 500 to be constantly neutral.

The air purifying device 300 provided in Embodiment 3 shown in FIG. 3 is substantially the same as the air purifying device 100 shown in Embodiment 1, except that the filter 500 is located slightly forward, that is, at the upstream of the filter 500, and is provided with at least A venting metal or conductive mesh 600 is attached to the ground of the circuit arrangement 201 of the ionizer 200. This arrangement allows the filter material of the filter 500 to be constantly neutral.

In some embodiments, a prefilter (Prefilter, not shown) is further disposed at the air inlet 301 of the fan for filtering dust particles with a large volume to prevent dust particles from being contaminated or damaging the blower. 300.

In the present invention, the ion release tip 202 is non-uniformly disposed on a cross section of the air flow passage of the air cleaning device such that all of the dust particles flowing through the air flow passage are to be cleaned by the filter 500. The air, only a portion of the dust particles flow through the ion release tip 202, becoming charged dust particles 803.

In a particular embodiment, the blower 300 is disposed upstream of the ion release tip 202; the filter 500 is placed downstream of the ion release tip 202. The air mixing space 400 is located between the blower 300 and the filter 500.

In a specific embodiment, the ion release tip 202 is located at the fan vent 302 and adjacent one of the cross-sections of the fan vent 302, as shown in FIGS. 1, 2, and 3. The release of ions by the ion releasing tip 202 needs to prevent dust particles in all air blown from the blower 300 from becoming charged dust particles. Otherwise, the charged dust particles will only repel each other and will not be gathered together to become more bulky. Large dust particles.

The cross-sectional area of the fan air outlet 302 is smaller than the cross-sectional area of the air mixing space 400. It is known from the fluid mechanics principle that the air blown by the fan air outlet 302 will generate turbulence or turbulence in the air mixing space 400. . Thereby, the original traveling route of the charged dust particles 803 and the uncharged dust particles 804 can be disturbed, and can collide with each other and adsorb each other to form a larger volume of dust particles 806. As shown at 805 in FIG.

Wherein, the position of the ion releasing tip 202 in Embodiment 1-3 is at the position of the fan air outlet 302, which is a side close to the cross section of the fan air outlet 302, so that all the air outlets from the fan are provided. 302 blowing air containing dust particles 803 and purifying the filter 500, only a portion of the dust particles flow through the ion release tip 202.

In a specific embodiment, as in the embodiment 4 shown in Fig. 4, the fan air outlet 302 has a cross section 302A which becomes smaller from the upstream to the downstream direction. The area of the largest cross section of the fan outlet 302 is equal to the area of the cross section of the air mixing space 400. It can be seen from the principle of fluid mechanics that the flow velocity of the airflow outlet 302 is small, and the flow velocity of the airflow is large. In this embodiment, the ion release tip 202 is disposed at an end near the flow velocity of the airflow, that is, at one end of the fan outlet 302 having a smaller cross section. The air containing the dust particles and being cleaned by the filter 500 is blown from the fan air outlet 302, and after passing through the set position of the ion releasing tip 202, in the position of the gradually enlarged cross-sectional area, the air flow speed Slowly, a portion of the dust particles 804 that have not flowed through the ion release tip 202, and a portion of the dust particles 803 that have become charged due to flowing through the ion release tip 202, are mixed in the air. In the space 400, in the case where the airflow speed is slowed down, the process 805 of "colliding and sticking to each other" is performed for a long time, and the effect of the dust particles having a smaller volume being integrated with the larger dust particles 806 is combined. better.

In a specific embodiment, as shown in embodiment 5 of FIG. 5, the ion release tip 202 is disposed in the air mixing space 400 at a position close to the fan air outlet 302 and adjacent to the fan air outlet. One side of the 302 cross section.

Still further, if the ion release tip 202 is disposed in the air mixing space 400, the ion release tip 202 is also in an airflow junction location 980. The airflow junction location 980, the airflow is changed from laminar flow 910 to turbulent or turbulent flow 920. As can be seen from the fluid mechanics principle, the upstream side of the airflow boundary position 980 as shown in FIG. 5, the airflow blown from the fan air outlet 302 is the laminar airflow 910, more specifically, the airflow near the ion release tip 202 side, Closer to the laminar airflow, and away from the side of the ion release tip 202, and as the airflow enters the downstream side of the airflow junction location 980, i.e., into the air mixing space 400, it becomes turbulent or turbulent.

The ion release tip 202 is disposed such that only a portion of the laminar flow 910 flows through the ion release tip 202, and the dust particles in the laminar air flow become charged dust particles, and the other portion does not flow through the chamber. The dust particles in the laminar airflow of the ion-releasing tip still maintain a neutral charge, the charged dust particles and the neutral-charged dust particles before the position of the ion-releasing tip 202, Or laminar flow, after the position of the ion release tip 202, enters the air mixing space 400, and turbulence or turbulent flow is formed in the air mixing space 400, and the relationship between the turbulence or the turbulent flow 920 is enhanced by the airflow, The effect of colliding and adsorbing each other, so that the junction integrates a large volume of dust particles, or a cluster of large volume dust particles, the bulky dust particles, or clusters of dust particles, which flow through the The filter 500 is captured by the filter 500 as described.

The invention also provides an air purification method, which uses an ion generator to be placed at one side of the flow of the airflow, and when the airflow flows, only a part of the airflow passes through the ionizer, wherein the dust particles in the airflow become charged The dust particles, the other part of the airflow does not pass through the ionizer, and the other part of the airflow has no charged dust particles, colliding with the dust particles that have been charged by the ionizer in the air mixing space. And gathered together to form a larger volume of dust particles that are captured by the filter as it passes through the filter as it passes through the filter.

Fig. 6 shows an experiment in which the air purifying apparatus of the first embodiment and the second embodiment was compared with the dust removing efficiency of the ion generator 200 and the unactivated ion generator 200. This experiment applied the following air purifying device for comparison: (1) Example 2 in which the ion generator was activated; (2) Example 1 in which the ion generator was activated; (3) Implementation of the ion generator not activated Example 2; (4) Example 1 in which the ionizer was not activated.

The order of dust removal efficiency from high to low is: (1)>(2)>(3)>(4). Among them, (1) has a clear dust removal efficiency than (2), and the dust removal efficiency of (3) and (4) is low, and the effect is similar. It can be seen that the ionizer 200 is activated, and the material of the filter 500 is kept neutral (to prevent the filter from becoming a charged filter), which effectively increases the dust removal efficiency.

Figure 7 shows an experiment in which the ion release tip 202 is placed at different locations and the air purification device has different dust removal efficiencies.

In this experiment, the following air purifying device was used for comparison: (1) the air purifying device of the second embodiment; (2) the air purifying device of the modified example 2, the ion releasing tip 202 was placed at the center of the fan air outlet 302, The dust particles in all the air blown out from the blower 300 are passed through the ion releasing tip 202, and all the dust particles become charged dust particles; (3) The air purifying device of the modified embodiment 2 is placed so that the ion releasing tip 202 is placed At the center of the fan inlet 301, the dust particles in all the air blown from the blower 300 pass through the ion release tip 202, and all the dust particles become charged dust particles; (4) Modification of the air of Embodiment 2 The purification device places the ion release tip 202 at the wind exit surface of the filter 500.

The order of dust removal efficiency from high to low is: (1)>(2)>(3)>(4).

Among them, (1) has obvious dust removal efficiency than (2) and (3), (2) and (3) have obvious dust removal efficiency, and (2) has a slightly higher dust removal efficiency than (3), but Similar.

It can be seen that the placement position of the ion release tip 202 has an important influence on the purification effect of the air purification device of the present invention. Mainly because all the air containing the dust particles and being cleaned by the filter 500 is blown from the fan air outlet 302, and only a part of the dust particles flow through the ions due to the position of the ion release tip 202. The tip 202 is released such that only a portion of the dust particles from the fan outlet 302 become charged dust particles, and a portion of the dust particles that do not flow through the ion release tip 202 remain. The neutral charge, the charged dust particles and the neutral-charged dust particles, in the air mixing space 400, collide with each other due to the flow of the gas from the laminar flow to the turbulent flow, and integrate the bulky dust particles Or a cluster of integrated dust particles, the bulky dust particles, or clusters of dust particles, captured by the filter 500 as the wind passes through the filter 500. It can be understood that the filter 500 captures a large volume of dust particles, which greatly increases the chance of capturing dust particles that are not formed into smaller volume, thereby significantly increasing the air purification effect.

If the ion release tip 202 is placed at the position described in (2) and (3), since the ion release tip 202 releases ions, all the dust particles are turned into charged dust particles, and the charged dust particles only interact with each other. Repelling does not form together into larger dust particles. Therefore, when dust with static electricity or electric charge passes through the filter screen, only the dust with a large volume or the dust whose volume is close to the gap of the filter screen is easily caught by the filter screen, and the dust with a small volume and a small amount of dust, The dust, which is smaller than the gap of the filter, causes it to flow downstream at the wind speed, and is not effectively attracted or deviated from its original wind speed when it is mutually repelled with other electrostatically charged dust. The downstream flow direction and the flocculation or mesh structure adsorbed on the filter screen, the filter interception efficiency limits the purification effect of the air purification device.

Figure 8 shows the process of air purification using the air purifying device of the present invention. First, the air purifying device draws in from the fan inlet 301 by the blower 300, and then sends the air 8002 containing the dust particles 804 and the filter 500 to be cleaned by the fan outlet 302, and at the same time, the air or airflow is also The upstream flow downstream.

The ion release tip 202 disposed at one end of the fan air outlet 302 or the ion release tip 202 disposed unevenly on the air mixing space 400 causes all the dust particles to be blown out from the fan air outlet 302. The air purified by the filter 500 has only a portion of the dust particles 8003 flowing through the ion release tip 202, becoming charged dust particles 8003, and the other portion not flowing through the ion release tip 202. The dust particles 8004 are still held as dust particles 8004 exhibiting a neutral charge, and the charged dust particles 8003 and the neutral-charged dust particles 8004 collide with each other in the air mixing space 400, and the volume is integrated. Large dust particles 8006, or integrated dust particle clusters 8006, are captured by the filter 500 as the larger volume of dust particles or clusters of dust particles 8006 pass through the filter.

Further, in the process of flowing through the air mixing space 400, due to the generation of turbulent flow or turbulent flow 8005, the chance of changing the original route direction by the smaller dust particles 8003, 8004 becomes larger, thereby enhancing mutual collision and mutual collision. The effect of adsorption together makes it easier for the smaller volume of dust particles 8003, 8004 to be integrated into a larger volume of dust particles or clusters of dust particles 8006.

Since the filter 500 captures the densely formed dust particles 8006, the chance of capturing the smaller volume of the dust particles 8003, 8004 is not greatly increased, thereby significantly increasing the air purification effect.

In contrast, as shown in FIG. 9, an air purifying device generally provided with an ionizing device and a filter is provided. If the ion releasing tip (or ionizing device) 6202 is uniformly placed on the passage of the airflow, all the dust particles 68004 in the air to be purified are Both become charged dust particles 68003, dust with a small volume of static electricity 68003, or a volume smaller than the gap 6500 of the filter, which drives the forward flow at the wind speed and interacts with other electrostatically charged dust. In the case of repulsion (as indicated by the arrow indicated by 681 in Fig. 9), it is still not effective to form a large volume of dust particles as described in the present invention, and thus cannot deviate from the direction in which the original wind speed drives the forward flow. Can not be attracted and can not be adsorbed on the floc or mesh structure of the filter. These volumes are smaller than the gap of the filter 68005. Even if static electricity is attached, it will escape from the gap of the filter. Therefore, the volume Smaller dust can't be effectively intercepted.

The above-mentioned embodiments are merely illustrative of several embodiments of the present invention, and the description thereof is more specific and detailed, but is not to be construed as limiting the scope of the invention. It should be noted that a number of variations and modifications may be made by those skilled in the art without departing from the spirit and scope of the invention. Therefore, the scope of the invention should be determined by the appended claims.

Claims

An air purifying device for purifying air containing dust particles, the air purifying device having an air inlet and an air outlet, and an air flow passage formed between the air inlet and the air outlet, the air purifying device comprising:

The fan includes a fan air inlet and a fan air outlet, and the fan is used to blow air along the air flow passage from the air inlet of the air purification device to the air outlet of the air purification device;

An ionizer comprising a circuit arrangement and an ion release tip;

a filter for capturing dust particles in the air;

An air mixing space, the air mixing space is located between the blower and the filter; one end of the output air of the air mixing space is communicated with an air outlet of the air purifying device through a filter, the air mixing space One end of the input air is communicated with the air inlet of the air purifying device through the fan;

The ion release tip is non-uniformly disposed on a cross section of the gas flow passage such that part of the dust particles in the air become charged dust particles; the air mixing space is opposite to the outer periphery of the air purification device The air pressure has a higher air pressure.
The air cleaning apparatus according to claim 1, wherein said fan is a hair dryer.
The air cleaning apparatus according to claim 1 or 2, wherein the fan is disposed at an upstream position of the ion releasing tip, and the filter is disposed at a position downstream of the ion releasing tip.
The air cleaning apparatus according to claim 3, wherein the ion releasing tip is located at a fan outlet and is adjacent to one side of the cross section of the fan outlet.
The air cleaning apparatus according to claim 4, wherein an area of the cross section of the air outlet of the fan is smaller than an area of a cross section of the air mixing space.
The air purifying apparatus according to claim 1 or 2, wherein the fan air outlet has a cross section which is enlarged from small to large, and the ion releasing tip is provided at one end of the fan air outlet having a small cross section.
The air cleaning apparatus according to claim 6, wherein an area of the largest cross section of the air outlet of the fan is equal to an area of a cross section of the air mixing space.
The air cleaning apparatus according to claim 3, wherein the ion releasing tip is disposed at a side of the air mixing space adjacent to the fan air outlet and adjacent to a cross section of the fan air outlet.
The air cleaning apparatus according to claim 3, wherein the ion releasing tip is disposed at a boundary between the laminar flow and the turbulent flow of the air mixing space, and/or a laminar flow and a turbulent flow boundary.
The air purifying apparatus according to claim 1, wherein the filter comprises a screen and a frame for fixing the screen, and an upstream position of the frame of the filter is connected to at least one conductive mesh, and A conductive mesh is connected to the ground of the circuit device of the ionizer; or the frame of the filter is a conductive frame.
A method for purifying air by using an air purifying device, the air purifying device having an air inlet and an air outlet, and an air flow passage formed between the air inlet and the air outlet, the method comprising the following steps:

Using a hair dryer to blow air containing dust particles along the air flow passage from the air inlet of the air purification device to the air outlet of the air purification device;

The ion generator is used to release ions so that part of the dust particles in the air become charged dust particles;

The charged dust particles in the air collide with the uncharged dust particles and are gathered together to become larger dust particles;

A filter is used to capture dust particles in the air.