CN215822563U

CN215822563U - Flow equalizer, dust removal filter screen and air cleaner

Info

Publication number: CN215822563U
Application number: CN202121903893.2U
Authority: CN
Inventors: 杨强; 沈国忠
Original assignee: Zhongche Tianjin Rail Transit Equipment Co ltd
Current assignee: Tianjin Zhongxin Rail Transit Equipment Co ltd
Priority date: 2021-08-13
Filing date: 2021-08-13
Publication date: 2022-02-15
Anticipated expiration: 2031-08-13

Abstract

The utility model relates to the technical field of air dust removal, and discloses a flow equalizer, a dust removal filter screen and an air filter. The air containing impurities enters the first channel through the dust exhaust port and the transition port, the air close to the two sides of the flow equalizer is discharged from the first dust collecting port, the air close to the middle part of the flow equalizer enters the second channel through the opening and is discharged from the second dust collecting port, and therefore the uniform distribution of the air containing the impurities is guaranteed, and the dust removal effect is improved.

Description

Flow equalizer, dust removal filter screen and air cleaner

Technical Field

The utility model relates to the technical field of air dust removal, in particular to a flow equalizer, a dust removal filter screen and an air filter.

Background

In the current society, rail transportation means mainly comprise transportation carriers such as diesel locomotives, electric locomotives, motor train units, high-speed rails, carriages of passenger cars and trucks, light rails, subways and the like, and road transportation means mainly comprise automobiles. Their normal operation requires the intake of a large amount of air to meet the requirements of combustion of the internal combustion engine, heat dissipation of electronic and mechanical components, and cooling of air conditioning and other facilities. Along with the suction of a large amount of air, a large amount of impurities such as sand, catkin, plant leaves, paper scraps, plastics and the like exist in the air, the impurities can cause abrasion to an internal combustion engine and the like, the service life of the internal combustion engine is shortened, and a dust removal device is usually arranged on an air supply channel of equipment in order to prevent the impurities from entering the equipment.

The dust exhaust outlet of the dust exhaust channel of the existing dust removal device is often directly connected with a fan or is connected with the fan through a pipeline so as to draw out dust through the suction of the fan, then the sectional area of the dust removal device is large, the number of the dust exhaust outlets is large, the suction force generated by the fan cannot be uniform, and particularly, under the condition that a dust exhaust pipe is long, the acting force on two sides connected with the fan is large, the acting force in the middle of the dust exhaust pipe is small, the dust in the middle of the dust exhaust pipe cannot be completely exhausted, dust impurities are accumulated near the dust exhaust channel, the dust adhesion of the dust removal device is easily accumulated at the dust exhaust outlet of the dust exhaust channel in the past, even the blockage of the dust exhaust outlet is caused, and the dust removal effect and the use of the dust removal device are influenced.

SUMMERY OF THE UTILITY MODEL

Aiming at the defects in the prior art, the utility model aims to provide a flow equalizer, a dust removal filter screen and an air filter to realize high-efficiency control dust removal.

In order to achieve the above purpose, the utility model provides the following technical scheme:

the utility model provides a current equalizer and include this current equalizer's air cleaner, current equalizer sets up to the tubular structure that has the collection dirt passageway, and radial cross sectional area dwindles to both sides by the centre, the collection dirt passageway passes through the baffle and separates for first passageway and second passageway, the baffle middle part is equipped with a plurality of openings, first passageway passes through the opening with second passageway intercommunication, first passageway both sides form first dust collection mouth, second passageway opening forms the second dust collection mouth, first dust collection mouth and second dust collection mouth constitute the collection dirt export of current equalizer.

In the utility model, further, two symmetrically arranged flow guide transition parts extend inwards from one side of the flow equalizer, which is far away from the second channel, a gap is arranged between the two flow guide transition parts to form a transition port, air containing impurities enters the first channel through the transition port, air close to two sides of the flow equalizer is discharged from the first dust collecting port, and air close to the middle part of the flow equalizer enters the second channel through the opening and is discharged from the second dust collecting port.

In the present invention, preferably, the two flow guiding transition portions are in a figure-of-eight shape, and the first channel includes a V-shaped cavity formed between each transition portion and an inner wall of the current equalizer.

In the present invention, it is preferable that the first passage has a larger radial cross-sectional area than the second passage.

In the present invention, further, the aperture of the opening is larger than the width of the transition port.

The dust removal filter screen is divided into a plurality of groups of air filter elements which are arranged in parallel by partition plates and have the same structure and are used for separating air impurities, the flow equalizer is arranged on the air filter elements, each air filter element comprises two guide plates which have the same structure and are symmetrically arranged, and a dust removal channel is formed between the two guide plates;

in the utility model, further, one end of the dust removal channel is an air inlet, the other end of the dust removal channel is a dust exhaust port, the dust exhaust port is communicated with the transition port, an air exhaust channel is formed between the guide plate and the partition plate, flowing air enters from the air inlet and is filtered by the guide plate, clean air is exhausted from the air exhaust channel, and air containing impurities enters the flow equalizer through the dust exhaust port.

In the utility model, further, the distance between the two guide plates and the partition plate is gradually increased from the air inlet to one side of the dust exhaust port.

In the utility model, further, the guide plate comprises a plurality of guide plates which are arranged in parallel and at intervals, a guide channel is formed between every two adjacent guide plates, and clean air enters the exhaust channel along the guide channel.

The air cleaner, the outside fixed connection frame of dust removal filter screen, the frame both sides are equipped with the collection dirt cavity, the collection dirt cavity with collection dirt export intercommunication.

In the present invention, preferably, the two dust collecting cavities are communicated through a dust collecting pipe, and the dust collecting pipe is used for connecting an induced draft fan.

Compared with the prior art, the utility model has the beneficial effects that:

the inner space of the flow equalizer is divided into a first channel and a second channel which are convenient for air flow equalization through the baffle plate, the baffle plate is provided with an opening which is used for communicating the first channel with the second channel, the radial section of the flow equalizer is gradually reduced towards two sides by taking the baffle plate as a center, namely two side walls of the flow equalizer are in an arc shape, so that the inner wall of the flow equalizer is prevented from being greatly impacted by high air speed, and meanwhile, the space of the first channel is increased through the splayed transition part, so that the flow equalization effect at a dust exhaust port is better. Because the dust removal filter screen, the current equalizer is longer, arrange unclean for the weaker dust of suction in the middle of preventing, consequently with the first passageway of current equalizer, the both ends of second passageway set up to first dust collecting opening and second dust collecting opening respectively, make the air that contains impurity through the dust exhaust opening, cross the ferryboat and get into first passageway, the air that is close to current equalizer both sides is discharged by first dust collecting opening, the air that is close to current equalizer middle part passes through the opening and gets into the second passageway, discharge by the second dust collecting opening, so, the even reposition of redundant personnel of the air that has guaranteed to contain impurity, thereby improve dust removal effect.

In addition, the width of the opening on the baffle plate is larger than that of the transition port, so that the air containing impurities discharged by the dust removal channel can be completely sucked into the flow equalizer. Meanwhile, the cross-sectional area of the second channel is larger than that of the first channel, so that the airflow at the dust exhaust port of the dust removal channel is more uniform. The space of first passageway has increased open-ended length simultaneously less relatively to reduce the dust exhaust resistance, reach the effect of even dust exhaust, solved long-term use and lead to the easy obstructed problem of dust exhaust mouth easily. And the flow equalizer has an integral structure and is low in cost.

The air cleaner of this scheme of utilization is when carrying out air dust removal, introduce the external air that flows from the air intake, the air removes dust after flowing into the dust removal passageway, clean air can get into the passageway discharge of airing exhaust along the water conservancy diversion passageway, the air that contains impurity can flow equalize through the flow equalizer earlier through the dust exhaust mouth, then in getting back to the atmosphere along with the air current row, thereby realized the separation of clean air and impurity, provide clean air steadily, the impurity of having exempted from the gathering blocks up air dust collector, and can guarantee to normally work for a long time under the condition of not clearing up, stronger automatically cleaning has, the non-maintainability.

Drawings

The accompanying drawings, which are included to provide a further understanding of the utility model and are incorporated in and constitute a part of this specification, illustrate embodiments of the utility model and together with the description serve to explain the principles of the utility model and not to limit the utility model. In the drawings:

FIG. 1 is an overall structural view of a current equalizer of the present invention;

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

FIG. 3 is an enlarged schematic view of the structure A of FIG. 2 according to the present invention;

FIG. 4 is an overall structural view of the air cleaner of the present invention;

FIG. 5 is a cross-sectional structural view of the air cleaner of the present invention;

FIG. 6 is an enlarged schematic view of the structure B of FIG. 5 in accordance with the present invention;

fig. 7 is a schematic structural view of a guide vane of the present invention;

FIG. 8 is a schematic view of a flow-impeding structure of the present invention;

in the figure: 1. a dust removal filter screen; 10. a partition plate; 11. an air filter element; 110. a baffle; 1100. a flow deflector; 1100-1, a drainage surface; 1100-2, a flow guide surface; 111. an air inlet; 112. a dust exhaust port; 113. an air exhaust channel; 114. a dust removal channel; 115. a flow guide channel; 12. a flow-impeding structure; 2. an outer frame; 3. a current equalizer; 30. a first channel; 300. a first dust collection port; 301. a V-shaped cavity; 31. a second channel; 310. a second dust collecting port; 32. a baffle plate; 33. an opening; 34. a flow guide transition part; 340. a transition port; 341. a wing-shaped dust collecting surface; 4. a dust collecting cavity; 5. a dust collecting pipe.

Detailed Description

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

It will be understood that when an element is referred to as being "secured to" another element, it can be directly on the other element or intervening elements may also be present. When a component is referred to as being "connected" to another component, it can be directly connected to the other component or intervening components may also be present. When a component is referred to as being "disposed on" another component, it can be directly on the other component or intervening components may also be present. The terms "vertical," "horizontal," "left," "right," and the like as used herein are for illustrative purposes only.

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 in the description of the utility model herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the utility model. As used herein, the term "and/or" includes any and all combinations of one or more of the associated listed items.

The air dust collector in the prior art, most directly rely on the fan to carry out the induced air suction to the gas that removes dust filter screen exhaust and contain impurity for it is longer to remove dust filter screen, consequently need have higher requirement to the volume of airing exhaust of fan, and cause very easily and the fan junction wind-force is big, and the impurity that is located the intermediate position is because wind-force is less, can't discharge, leads to dust removal effect not good, makes dust exhaust mouth department block easily, especially the intermediate position.

The utility model provides a flow equalizer, as shown in fig. 1, the flow equalizer 3 is set as a tubular structure with a dust collecting channel, the dust collecting channel is divided into a first channel 30 and a second channel 31 by a baffle 32, the middle part of the baffle 32 is provided with a plurality of openings 33, the first channel 30 is communicated with the second channel 31 by the openings 33, two sides of the first channel 30 form a first dust collecting opening 300, the openings 33 of the second channel 31 form a second dust collecting opening 310, and the first dust collecting opening 300 and the second dust collecting opening 310 form a dust collecting outlet of the flow equalizer 3.

The inner space of the current equalizer 3 is divided into a first channel 30 and a second channel 31 which are convenient for air flow equalization through the baffle 32, the baffle 32 is provided with an opening 33 which is used for communicating the first channel 30 with the second channel 31, and the radial section of the current equalizer 3 is gradually reduced towards two sides by taking the baffle 32 as the center, namely two side walls of the current equalizer 3 are in an arc shape, so that the inner wall of the current equalizer 3 is prevented from being impacted greatly due to high wind speed. Because the dust removal filter screen 1 is longer, the flow equalizer 3 of equal proportion is also longer, in order to prevent the middle weaker dust of suction from discharging unclean, consequently set up the first passageway 30 of flow equalizer 3, the both ends of second passageway 31 respectively into first dust collecting opening 300 and second dust collecting opening 310, make the air that contains impurity get into first passageway 30 through dust discharging opening 112, the air that is close to flow equalizer 3 both sides is discharged by first dust collecting opening 300, the air that is close to flow equalizer 3 middle part passes through opening 33 and gets into second passageway 31, discharge by second dust collecting opening 310, so, the even reposition of redundant personnel of the air that has guaranteed to contain impurity, thereby improve dust removal effect.

In the present invention, further, two symmetrically arranged flow guiding transition portions 34 extend inward from one side of the flow equalizer 3 away from the second channel 31, a gap is arranged between the two flow guiding transition portions 34 to form a transition port 340, air containing impurities enters the first channel 30 through the transition port 340, air near two sides of the flow equalizer 3 is discharged from the first dust collecting port 300, and air near the middle of the flow equalizer 3 enters the second channel 31 through the opening 33 and is discharged from the second dust collecting port 310. The two diversion transition parts 34 are in a shape of a Chinese character 'ba', and the second channel 31 comprises a V-shaped cavity 301 formed between each transition part and the inner wall of the flow equalizer 3, so that the space of the second channel 31 is increased through the transition parts in the shape of the Chinese character 'ba', and the flow equalizing effect at the dust exhaust port 112 is further provided.

The flow guiding transition part 34 has an airfoil dust collecting surface 341, the airfoil dust collecting surface 341 is used for pushing dust from the dust removing channel 114 to the dust collecting channel, the shape of the airfoil dust collecting surface 341 is set to be convex, this is because wind can locally generate vortex on the dust collecting surface when passing through the dust collecting surface of the concave structure, block and change the flow direction of wind, be unfavorable for the flow guiding effect of the dust collecting surface to the air current, the vortex influence brought when the flow guiding transition part 34 is cut down by the airfoil dust collecting surface 341 adopting convex shape, the flow guiding effect of the airfoil dust collecting surface 341 is accelerated, and the smooth air current carrying dust is rapidly conveyed to the dust collecting channel for flow equalization and dust discharge.

In addition, the width of the opening 33 on the baffle 32 is larger than that of the transition port 340, so as to ensure that the air containing impurities discharged from the dust removing channel 114 can be completely sucked into the flow equalizer 3. Meanwhile, the cross-sectional area of the second channel 31 is larger than that of the first channel 30, so that the airflow at the outlet of the dust removing channel 114 is more uniform. The space of the first passage 30 is relatively small, and the length of the opening 33 is increased, so that dust discharging resistance is reduced, the effect of uniform dust discharging is achieved, and the problem that the dust discharging port 112 is easy to block due to long-term use is solved. And the flow equalizer 3 is integrally formed in the whole structure, so that the cost is lower.

In another embodiment of the present invention, as shown in fig. 2, a dust removing filter net 1 is provided, the dust removing filter net 1 is composed of a plurality of air filter elements 11 separated by partition boards 10 and arranged in parallel for separating air impurities, and flow equalizers 3 are installed on the air filter elements 11, so that the dust removing work can be performed while the plurality of groups of air filter elements 11 are installed side by side, thereby improving the dust removing efficiency and meeting the air filtering requirement in a large ventilation volume.

As shown in fig. 3, the air filter element 11 includes two symmetrically disposed baffles 110 with the same structure, a dust removing channel 114 is formed between the two baffles 110, and the dust discharging port 112 and the dust removing channel 114 are disposed opposite to each other and are communicated with each other. One end of the dust removing channel 114 is an air inlet 111, the other end is a dust outlet 112, the dust outlet 112 is communicated with the transition port 340, an exhaust channel 113 is formed between the guide plate 110 and the partition plate 10, flowing air enters from the air inlet 111 and is filtered by the guide plate 110, clean air is discharged through the exhaust channel 113, and air containing impurities enters the flow equalizer 3 through the dust outlet 112 for flow equalizing and dust collection.

In this embodiment, further, the distance between the two baffles 110 and the partition board 10 gradually increases from the air inlet 111 to the dust outlet 112 side. Because the air enters from the air inlet 111, the air flow rate of the air inlet 111 is relatively large, and the air flow rate can be reduced in the flowing process of the atmosphere along the dust removing channel 114 in the air filter element 11.

In the present invention, as shown in fig. 5 and 7, the guide plate 110 includes a plurality of guide plates 1100 arranged in parallel and at intervals, a guide channel 115 is formed between adjacent guide plates 1100, and clean air enters the exhaust channel 113 along the guide channel 115. The guide vane 1100 may be an airfoil shape (shown in fig. 7), an arc shape, a broken line shape, a rectangle shape, or other regular or irregular shapes. In order to facilitate the arrangement of the dust exhaust port 112, in the embodiment, the shape of the diversion transition portion 34 is similar to or completely approximate to the shape of the diversion piece 1100, so that the airflow coming out of the dust removing channel 114 cannot change the airflow direction due to the change of the shape of the transition portion, thereby better playing a role of diversion.

Specifically, the distance between each baffle 1100 and the partition 10 gradually increases along the direction from the air inlet 111 to the dust exhaust port 112, that is, the baffle 1100 inclines toward the air inlet 111. The air in the flow guide flows obliquely backward relative to the air in the dust removing channel 114, so that a high-pressure area which is higher than the pressure of the central part of the airflow in the dust removing channel 114 is formed at the joint of the flow guide channel 115 and the dust removing channel 114, the high-pressure area can push the lighter impurities (such as floccules) which are entrained in the airflow in the dust removing channel 114 and are close to the flow guide channel 115 back to the central position of the dust removing channel 114, so that the lighter impurities cannot enter the flow guide channel 115, and the lighter impurities can continuously move along with the airflow to the dust discharging channel. And if the heavier impurities (such as sand grains) entrained in the airflow of the dust removing channel 114 reach the flow guide channel 115, the impurities impact the inner wall of the flow guide channel 115 (namely the surface of the flow guide sheet 1100), are ejected back to the central position of the dust removing channel 114, and keep moving towards the dust removing channel due to the inertia of the impurities, but do not move towards the flow guide channel 115 at the oblique rear. In addition, if impurities (such as rainwater) with large moisture are mixed in the airflow of the dust removing channel 114 and reach the guide channel 115, the inner wall of the guide channel 115 is atomized and then pushed back to the central position of the dust removing channel 114 by the airflow, so that the dust removing effect is further improved, and the impurities cannot enter the exhaust channel 113 along the guide channel 115.

In the present invention, as shown in fig. 8, a flow blocking structure 12 is disposed at one end of the partition board 10 close to the air inlet 111, and the flow blocking structure 12 is a protrusion symmetrically disposed about the partition board 10. The purpose is to generate certain resistance to the air flowing in at high speed, even if static pressure is generated on two sides entering the dust removal channel 114, the pressure on the two sides is larger, so that dust, especially small-particle dust or impurities with smaller specific gravity (especially plant fragments, catkin, poplar catkin and other floating objects) can move towards the center direction of the dust removal channel 114 more easily, and the dust removal effect is improved.

In this embodiment, the working principle of the dust removing filter net 1 is as follows: when there is a certain speed of air flow in the outside air, the air inlet 111 faces the air flowing direction, so that the outside air enters the air filter element 11 from the air inlet 111. The external air first enters the dust removing passage 114, and impurities are present in the air entering the dust removing passage 114. Because each guide plate 110 has a certain inclination angle, it will generate a certain resistance to the airflow, so that the wall pressure in the dust removing channel 114 is increased, i.e. the static pressure is increased, and the central position of the airflow in the dust removing channel 114 is relatively fast in flow speed and small in static pressure. Therefore, the impurities such as particles, flocs, water drops, etc. entrained by the airflow of the dust removing channel 114 will flow along the central line of the dust removing channel 114 under the action of the wall pressure. And under the action of unequal static pressure, the impurities are easier to approach the direction of the central line of the dust removal channel 114, so that the impurities are more favorable for moving to the dust removal channel, enter the flow equalizer 3 from the dust removal port, equalize the flow and then are discharged.

Meanwhile, in the dust removing passage 114, when passing through the position of the air guide passage 115, a part of air enters the air guide passage 115 and flows out from the air exhaust passage 113, and the part of air is clean air. The specific principle is as follows: when the airflow enters the guide passage 115 from the dust removing passage 114, part of the energy is lost, so that the airflow speed in the guide passage 115 is slower than that in the dust removing passage 114. Therefore, when the air flow containing the impurities in the dust removing channel 114 approaches the guide flow channel 115, since the attraction force at the guide flow channel 115 is small and the inertia of the movement of the impurities cannot be overcome, that is, the air flow velocity in the dust removing channel 114 is greater than the air flow velocity in the guide flow channel 115, the impurities cannot enter the guide flow channel 115, and thus the clean air and the impurities can be separated by themselves. The ratio or difference between the airflow speed in the flow guide channel 115 and the airflow speed in the dust removing channel 114 can be adjusted by adjusting the difference between the cross sections of the two channels and adding a power source such as a fan at the channel opening.

Therefore, the clean air without impurities can enter the exhaust channel 113 from the flow guide channel 115, and the impurities such as particulate matters, floating matters and the like are gathered to the dust exhaust channel along with the airflow of the dust exhaust channel 114 and then enter the flow equalizer 3 from the dust exhaust port to be equalized and then discharged, so that the clean air and the impurities are separated by using the air filter element 11. Provide clean air through the device steadily, both avoided the impurity of gathering to block up the device, saved the trouble of artifical clearance air dust collector again, practiced thrift manpower, material resources and financial resources to can guarantee to normally work for a long time under the condition of not clearing up.

With the above principle, as shown in fig. 4, 5 and 6, another embodiment of the present invention provides an air cleaner, wherein a dust-removing filter screen 1 is externally and fixedly connected to an outer frame 2, dust-collecting cavities 4 are disposed at two sides of the outer frame 2, and the dust-collecting cavities 4 are communicated with the dust-collecting outlet. Wherein the dust collecting outlets are a first dust collecting port 300 and a second dust collecting port 310. The two dust collecting cavities 4 are communicated through a dust collecting pipe 5, and the dust collecting pipe 5 is used for connecting an induced draft fan. Provide outside effort for two collection dirt cavities 4 through the draught fan, for guaranteeing that collection dirt is convenient, communicate two collection dirt cavities 4 through dust collecting tube 5, wherein dust collecting tube 5 can be located multiple positions such as the filter screen 1 outside of removing dust, middle part, no longer regard as the injecing here.

In the present embodiment, it is preferred that,

the working principle is as follows: when the air filter of this scheme of utilization is removing dust to the air, introduce the external air that flows from air intake 111, the air removes dust after flowing into dust removal passageway 114, and clean air can get into exhaust passageway 113 along water conservancy diversion passageway 115 and discharge, and the air that contains impurity can get into current equalizer 3 through dust exhaust port 112.

Under the action of a fan, acting force which is sucked out outwards is provided in the dust collection cavity 4 and the flow equalizer 3 communicated with the integrated cavity, air containing impurities enters the first channel 30 through the dust exhaust port 112 and along the transition port 340, airflow at the dust exhaust port 112 is enabled to uniformly enter the first channel 30, air close to two sides of the flow equalizer 3 enters the dust collection cavity 4 through the first dust collection port 300, air close to the middle of the flow equalizer 3 enters the second channel 31 through the opening 33 and enters the dust collection cavity 4 through the second dust collection port 310, and finally air in the dust collection cavity 4 is sucked out by the fan.

So, so that the separation of clean air and impurity has been realized, clean air is provided to the equipment compartment steadily, and the impurity of having avoided gathering blocks up air dust collector to can guarantee to normally work for a long time under the condition of not clearing up, have stronger automatically cleaning, non-maintaining ability.

The above description is intended to describe in detail the preferred embodiments of the present invention, but the embodiments are not intended to limit the scope of the claims of the present invention, and all equivalent changes and modifications made within the technical spirit of the present invention should fall within the scope of the claims of the present invention.

Claims

1. The utility model provides a current equalizer, its characterized in that, current equalizer (3) set up to the tubular structure who has the collection dirt passageway, and radial cross sectional area dwindles to both sides by the centre, the collection dirt passageway passes through baffle (32) and separates for first passageway (30) and second passageway (31), baffle (32) middle part is equipped with a plurality of openings (33), first passageway (30) pass through opening (33) with second passageway (31) intercommunication, first passageway (30) both sides form first dust collection mouth (300), second passageway (31) opening (33) form second dust collection mouth (310), first dust collection mouth (300) and second dust collection mouth (310) constitute the collection dirt export of current equalizer (3).

2. The flow equalizer according to claim 1, wherein two symmetrically arranged flow guiding transition parts (34) extend inwards from one side of the flow equalizer (3) away from the second channel (31), a gap is formed between the two flow guiding transition parts (34) to form a transition port (340), air containing impurities enters the first channel (30) through the transition port (340), air near two sides of the flow equalizer (3) is discharged from the first dust collecting port (300), and air near the middle of the flow equalizer (3) enters the second channel (31) through the opening (33) and is discharged from the second dust collecting port (310).

3. A flow equalizer according to claim 2, characterized in that the two flow-guiding transitions (34) are splayed, and the first channel (30) comprises a V-shaped cavity (301) formed between each transition and the inner wall of the equalizer (3).

4. A flow equalizer according to claim 2, characterized in that the first channel (30) has a larger radial cross-sectional area than the second channel (31).

5. A flow equalizer according to claim 2, characterized in that the aperture of the opening (33) is larger than the width of the transition port (340).

6. The dust removal filter screen is characterized in that the dust removal filter screen (1) is divided into a plurality of groups of air filter elements (11) which are arranged in parallel by partition plates (10) and have the same structure and are used for separating air impurities, the flow equalizer (3) of any one of claims 2 to 5 is arranged on the air filter elements (11), the air filter elements (11) comprise two guide plates (110) which have the same structure and are symmetrically arranged, and a dust removal channel (114) is formed between the two guide plates (110);

one end of the dust removal channel (114) is an air inlet (111), the other end of the dust removal channel is a dust exhaust port (112), the dust exhaust port (112) is communicated with the transition port (340), an air exhaust channel (113) is formed between the guide plate (110) and the partition plate (10), flowing air enters from the air inlet (111) and is filtered through the guide plate (110), clean air is exhausted through the air exhaust channel (113), and air containing impurities enters the flow equalizer (3) through the dust exhaust port (112).

7. The dust removing filter screen according to claim 6, wherein the distance between the two flow deflectors (110) and the partition (10) is gradually increased from the air inlet (111) to the dust outlet (112).

8. The dust screen according to claim 6, wherein the air deflector (110) comprises a plurality of parallel and spaced air deflectors (1100), and an air guiding channel (115) is formed between adjacent air deflectors (1100), and clean air enters the air exhaust channel (113) along the air guiding channel (115).

9. The air cleaner is characterized by comprising the dust removal filter screen as claimed in any one of claims 6 to 8, wherein the dust removal filter screen (1) is fixedly connected with an outer frame (2) at the outside, dust collection cavities (4) are arranged at two sides of the outer frame (2), and the dust collection cavities (4) are communicated with the dust collection outlet.

10. The air cleaner according to claim 9, wherein the two dust collecting cavities (4) are communicated through a dust collecting pipe (5), and the dust collecting pipe (5) is used for connecting an induced draft fan.